Radio Controlled Helicopters For Sale

Electric Micro Cars

Electric Micro Cars

Enjoy the Entertainment of Driving RC Toy Cars

RC Toy Car give fun and enjoyment of playing like no other toys, for children and adults alike. If there is a child’s birthday coming up around your family why not consider make them smile by a RC toy car as a present. Or may be you are planning ahead for the upcoming Christmas holidays so why not put a RC toy car in you presents-to-buy list. The fastest and most exciting category, nitro RC cars can go as fast as 50 – 60+ miles per hour. The 1/8 gas cars go 70 – 80 mph in racing competitions. These are sometimes also called gas powered RC cars. For beginners, Electric RC Car are the best as they are easier to control, build, and maintain. If you prefer playing or racing indoors or have limited space to play, there are small but fast micro and mini RC toy cars. One of the hottest segment of the hobby, and companies are scrambling to produce their own mini RC toy cars and trucks. Mini RC Car are great for keeping the kids entertained. Not only are they generally less expensive than the full size versions, but they are also easy to travel with, however, keep in mind that minis are small toys, that could pose a choking hazard to young kids. Therefore, make sure the activities that you develop are age appropriate. There are several fun activities that you can develop around the mini RC toy cars. The first is a basic race. You can quickly set up a race track by using pool noodles and floaters. These objects are light weight and can be stored in your trunk and easily transported to the lake or summer house with you. How to drive the RC toy cars? Go outside find a large patch of pavement somewhere outside. This area should be wide open and smooth so the car can easily drive on it; Learn the controls after finding an area to drive your car, learn what the controls do; Practice especially if having the second style of controls that I mentioned; Organize a Race If you have some friends with RC cars on a different frequency than yours, you can probably race them; Then finally, you can just enjoy yourself, if you have a pet, try playing with them using the car. Make obstacle courses for yourself. Do whatever makes you happy! Source by: http://blog.topons.com/index.php/2010/08/enjoy-the-entertainment-of-driving-rc-toy-cars/

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Koolatron KWC-4 Coca-Cola Personal 6-Can Mini Fridge $41.25 Koolatron Coca – Cola Personal Cooler / Warmer provides storage and temperature control for food and beverages. Cool or warm your food and drinks easily. The Coca-Cola Personal Cooler / Warmer looks like a small refrigerator and is perfect for the car, boat or home. It holds up to six 12-oz. cans of soda or beer. It operates on 12V DC or 110V AC with an AC adaptor. Cools food and drinks to 32 degr…

4 Liter AC/DC Portable Mini Fridge Cooler Warmer (White) $45.49 This mini-fridge is great for those who eat at their desk, on the road or who need a cold drink or snack close by. Healthy people who need a healthy perishable snack or meal will love this unit. The mini fridge works without any liquid refrigerants (like freon), noisy motors or messy condensation. The quiet environmentally friendly semiconductor system keeps your items cold or hot as you choose. …

Rally 7285 12V Portable Refrigerator and Warmer $39.52 This mini-refrigerator/warmer is ideal when traveling. This unique unit operates on 12V DC power in your vehicle while you’re on the road. Makes a great gift!. Keeps drinks and food cold or hot. Magnetic cover with air seal and internal insulator provides for correct interior temperature with maximum efficiency. Rust proof, impact, and weather resistant housing. Compact housing with spacious inter…

Belkin Mini Surge Protector Dual USB Charger $12.99 Protect your electronic devices while traveling….

Bosch ROS20VSK 120-Volt Variable Speed Random Orbit Sander Kit $69.97 Bosch ROS20VSK 5″ Variable Speed Palm-Grip Random Orbit Sander KitBosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accessory manufacturers in the world. Bosch provides a complete line of corded and cordless power tools and accessories engineered to survive any jobsite and allow professionals to take contr…

360 Degree Spin Mop & Spin Dry Bucket – Color may vary $22.99 This is ORIGINALLY INVENTED as Spin Dry Mop. The mop head moves 360 degrees and it can clean any place in your house, office and restaurant. It reaches and cleans narrow place that other can never or hard to reach such as between refrigerator and wall, washer and wall, window, blind, bathroom ceiling, wall and so on!! It also can be used as dust remover when it’s dry. You can clean TV, computer, m…

Sylvania 29490 23-Watt CFL Mini Twist Light Bulb, Soft White, 6 pack $21.00 Sylvania 23-Watt Compact Fluorescent Mini Twist Soft White Light Bulbs are not only energy-efficient money savers, but they’re also high-quality light producers. Unlike some CFLs that can be harsh and glaring, these bulbs provide a soft white light for a pleasant atmosphere. With six bulbs included, this pack is great for replacing all of the old, inefficient incandescent light bulbs in your home….

Medi-Fridge IIx Portable Micro-Refrigator for Diabetic & Other Injectable Medicines, MF-MRIlx – 1 ea $62.90 Designed for refrigerating diabetic Byetta® (Exenatide), Humulin® and Humalog® insulin, Forteo®, and other injectable medicines while traveling or at work, outdoors or in your vehicle! Refrigerates up to 6 standard 10 mL insulin/injectable medicine vials OR 2 injectable pen for diabetes Includes both a UL certified 110-240V (house current) worldwide power cord and a 12V DC auto socket power c…

Small Fan & Mini-Air Conditioner: The Original Handy Cooler in Blue. Portable and convenient. Runs on batteries or USB. Cools air up to 30F. $34.30 Small fan that can cool air up to 30F. This revolutionary evaporative cooling fan is the closest thing to a hand held mini air conditioner! Use it outdoors or keep it indoors as a desk fan. Provides gentle cool breeze. Uses evaporative cooling technology. Add water to soak the cooling filter. Ambient air is forced through the wet cooling filter and cools down. Works best in dry and hot climates. F…

Belkin Mini Surge 3 Outlet Wall Mount with USB Charger $20.09 Hotel rooms and airport terminals never seem to have enough power outlets to charge all the devices todayâ?TMs traveler brings along. Now you can add outlets and peace of mind on business trips and vacations with the Belkin Mini Surge Protector.This new design features three AC outlets and two powered USB outlets* – perfect for MP3 players and mobile phones.*Important: This productâ?TMs USB outl…

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Electric Rc Planes

Electric Rc Planes

Electric Rc Jets – Explore Your Options

With more advancement in radio control and electronic technology more and more RC jets are becoming available for hobbyists today taking the hobby to another level. It’s a great thrill to see large scale RC jets in action. They are the pinnacle of the hobby and look and sound phenomenally realistic in the air, and a beautifully built scale model is quite a sight to watch in flight. To see them, even if only on display, they are still very impressive to look at if beautifully built.
If you’re a beginner or an intermediate flyer and buying a gas turbine is out of reach, you can always buy a two-stroke glow plug engine jet model. And if you don’t want the glow plug engine mess then you can even get one with an electric brushless motor called an electric ducted fan RC Jet or EDF jet, being a cleaner option.
Of course, you will lose some realism but all the flight characteristics will remain intact and the aircraft will behave more like a jet than an airplane. The Hanger 9 F-22 Raptor PTS Trainer is a great “entry-level” example. This electric RC Jet is an RTF version and comes with the FS One RC Flight Simulator and is powered by the Evolution engine and controlled by the famous JR system of radios.
Electric RC Jet have a great advantage. They are not affected by wind because of their sheer speed and aerodynamics but need extra airspace due to that aspect. The only problem, however, is that they need more space for turns and aerobatic maneuvers, which brings us to another dilemma – that of losing sight of your plane! There will be times when you will not be able to see what your plane is doing, which increases the risk of disorientation!!
It’s a great idea to locate your local RC club as it has several advantages. One of them is that you will always find hobbyists willing to help you with anything you want – maybe even an instructor. Local RC clubs hold events under several categories such as gas powered and jet powered scale, pylon racing, etc. So it’s worth a try!
So, as you can see there are many options available to you if you want to get into RC jet flying. But flying these aircrafts requires a lot of skill, gained after much experience in flying other slower models, of which there are many to choose from. And if the adrenalin is getting the better of you it’s better to keep it in control as it is always better to work your way up to advanced RC airplanes rather than jumping into the deep end of Electric RC Jets or Gas ones with no or little training only ending in losing your prized expensive beautiful RC Jet on its first flight.

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Chebe Original Bread Mix — 7.5 oz $3.49 Delicious. By Nature It was 1999 when Chebe decided to bring to the U.S. the great tasting bread enjoyed in Brazil. Even though it was naturally gluten free, Chebe didn’t make a big deal about it until loads of mail came from gluten-intolerant customers. The message was simple: customers loved that the bread was full of flavor without an aftertaste. Today Chebe’s dry mixes and frozen breads prove …

Watt’s Up RC Watt Meter & Power Analyzer WU100 Version 2 — SALE! $54.00 # Specifications: # Voltage 0-60 V, resolution 0.01 V. That’s a 14 cell series li-poly pack! # Current 0-100 A peak, 50 A continuous, resolution 0.01 A # Charge 0-65 Ah, resolution 0.001 Ah. That’s ~32 Amps for two hours! # Power 0-6500 W, resolution 0.1 W. That’s ~8.7 Horsepower! # Energy 0-6500 Wh, resolution 0.1 Wh. # Operates from 4.0-60 V, 0 V with optional receiver battery pack # 16 x 2 STN…

Amico 5 Pairs Male and Female T Plug for RC Battery Connector $4.93 Excellent for high drain applications in electric cars, trucks, planes or helicopter.These T Plug connectors come in male and female for easy soldering.Includes 5 pieces Male and 5 pieces of Female connectors….

Phase 3 EF-16 EDF R/C w/Fan/Brushless Motor & ESC $154.98 Fly your next sortie with the EF-16 from Phase 3 Models. This amazing EDF aircraft is fast, fun, and shockingly easy to fly. Its comparatively light wing loading, efficient wing and smooth lines make it fast on those full-throttle dive bombing runs, yet is still a pussycat at low throttle and glide settings. A modern jet model is usually not so easy to fly! The included EF (Electric Fan) system is…

Parrot AR.Drone Quadricopter Controlled by iPod touch, iPhone, iPad, and Android Devices (Orange/Blue) $249.00 The AR.Drone remote-control quadricopter is a groundbreaking device combining the best of many worlds, including modeling, video gaming, and augmented reality. The AR.Drone is remote-controlled by an iPhone and features a number of sensors, including a front camera, vertical camera, and an ultrasound altimeter. The AR.Drone can also be used in video games, such as AR.FlyingAce, a dogfight between …

Electric Paper Plane Launcher Kit $9.95 Product Description Electricity Science Kit: Electric Paper Plane Launcher. Your paper airplanes will be flying through the air with this fun launcher. Ready for take off! This do-it-yourself science kit contains everything you need to learn how spinning motors and plastic discs are used to launch a paper plane at up to 31 mph (50 km/h). Includes components for assembling the launcher and detailed…

Syma S107/S107G R/C Helicopter – Yellow $16.99 The brand new GYRO S107 3.5CH Mini RTF RC Helicopter comes with the greatest advancement in Helicopter Technology, a Gyro. No more crashing, no more replacing parts, the GYRO has changed the Helicopter industry completely, making this RC Helicopter super easy to fly and maneuver. Great for people of all skill levels, this bad boy features a coaxial rotor a single rear rotor for precise movement an…

Syma S109G Apache AH-64 3.5-Channels Mini Indoor Helicopter $16.99 The Syma S109G is a palm size 3-Channels Helicopter, it has a youngest brother in the Syma Apache line. The S109G has a Co-Axial structure which is specially made for first time flyers. The S109G is built with thick plastic body which always survives in crashes. The Syma S109G is equipped with a 4-in-1 receiver (Gyro, ESC, Mixer, Receiver), allows the helicopter to move in all directions. This hob…

Coast Guard Rescue RC 3.5CH Gyro Helicopter Mini Infrared Remote Controlled SYMA Heli S111G $12.95 Coast Guard Rescue RC 3.5CH Gyro Helicopter Mini Infrared Remote Controlled SYMA Heli S111G - Built-in Electric Gyroscope System - 4-in-1 infrared receiver: Gyro, ESC, Mixer, Receiver - 6 directional fight: Ascending, descending, turn left, turn right, forward & backward - Adjustable Trim Control - Intelligent R/C system - Newly designed electricity saving function - High efficient gear slowdown …

Rack’Em Off-Shore 3-Rod Horizontal Rack $12.63 Horizontal rack holds 6 off-shore rods and reels . Alternate rod directions to increase distance between reels. Strong steel construction with plastic coating will not harm rods. Mounting screws included….

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E-Flite Super Airliner Df Arf

E-Flite Super Airliner Df Arf

E-Flite Super Airliner DF ARF RC Airplane $219.99 The Scale Super Airliner DF ARF from E-flite offers scale electric flyers an incredible combination of features in a plane that’s nearly ready to take flight right from the box….

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Electric Micro Aircraft

Electric Micro Aircraft

GENERAL KNOWLEDGE Pt. II

• WHAT IS THE SLENDERNESS RATIO?

Columns used for construction have a definite value called the crippling load or buckling loadthe load at which the column bends or buckles but does not break. The effective length of the column is the length of an equivalent column of the same material and cross sectional area with hinged ends and having the value of the crippling load equal to that of the given column. The least radius of gyration is the radius of gyration where the least moment of inertia is considered. The ratio of effective length to the least radius of gyration is called the slenderness ratio of the column.

• WHAT IS SPECIAL ABOUT TEMPLE SQUARE?

The Temple Square in Utah is very religious place for the members of The Church of Jesus Christ of Latter Day Saints. It’s symbolic of the holy ordinances or covenants that take place there To Mormons, the Gospel of Jesus is not complete without temples The Temple Square is special because it reminds the Mormons of the sacrifices by the pioneers who erected it. It is also the headquarters of the Church of Jesus Christ of Latter Day Saints.

• WHO DISCOVERED SATURN’S RINGS?

Christian Huygens, a Dutch physicist and astronomer, found out that Saturn has rings. He also discovered the Titan, the moon of Saturn.

• IS THERE ANY MAGNET WITH A SINGLE POLE?

Magnets found in nature and those made by man, are found to have two poles without exception. In contrast, electrical charges can be separated from each other. Several experiments to detect magnetic monopoles have been inconclusive.

• WHEN DID THE FIRST MANNED BALLOON FLIGHT TAKE PLACE?

In the late eighteenth century two French    papermakers, the Mont golfer’s brothers, began experimenting with hot air balloons. On Oct 15, 1783, a French scientist, Francois de Rozier became the first person to make a balloon ascent. He rose to a height of 80 ft in a balloon made by the Mont golfers.

• WHAT IS VSAT THE ACRONYM FOR?

VSAT stands for Very Small Aperture Terminal. VSAT nodes are networked together, using an antenna directed at a geo-stationary satellite. VSAT technology is used for transmission of information and is extremely popular in banking and financial services, Multisided manufacturing and for linking government offices.

• HAVE YOU HEARD OFBUCKYBALLS?

Buck balls   are   microscopic spheres of 60 carbon atoms that resemble a dome. They have cavities large enough to hold other atoms — even full molecules. Unless heated to a very high temperature, the contents of the cavities do not emerge. This has enormous potential in the fields of medicine, miniature mechanics, battery technology and high strength materials.

• WHAT IS ‘NUCLEAR WINTER’?

‘Nuclear winter’ is used to describe the aftermath of a nuclear explosion caused due to a nuclear war or a nuclear accident. The impact of this explosion would be so devastating that unquantifiable amounts of dust and smoke would be released into the earth’s stratosphere. This would block the sun’s energy from reaching the surface of the earth, thereby lowering the temperature. The period of this effect would be determined by the intensity of the explosion. ‘Nuclear winter’ would threaten the existence of life on Earth.

• HOW DOES A GAS LIGHTER WORK?

Certain crystalline materials (like quartz, |Rochelle salt and certain ceramics) have piezoelectric behaviour. When you apply pressure to them, you get a charge separation within the crystal and a voltage across the crystal that is sometimes extremely high. For example, in a barbecue lighter, the popping noise you hear is a little spring-loaded hammer hitting a crystal and generating thousands of volts across the faces of the crystal. A voltage this high is identical to the voltage that drives a spark plug in a gasoline engine. The crystal’s voltage can generate a nice spark that lights the gas in the grill.

• HOW DOES A PILOT KNOW THE ROUTE TO A DESTINATION HE IS FLYING?

Pilots rely heavily on computerized controls and with the assistance of the autopilot and the flight management computer, steer the plane along their planned route. They are monitored by air traffic control ‘stations they pass along the way. They regularly check their fuel supply, condition of their engines and the air-conditioning, hydraulic, and other systems. Pilots may request a change in altitude or route if circumstances dictate.

• WHAT KIND OF HEALING DID DR EDWARD BACH PIONEER?

Dr Edward Bach pioneered a kind of healing called flower remedy therapy. This treats predominantly mental and emotional manifestations of disease, relying on administration of remedies derived from the flowering parts of plants. Dr Bach considered total 38 remedies sufficient to treat the most common negative moods that afflict mankind. After his death, many remedies were added and now the total is more than 200. He believed that the remedies were divinely enriched.

• WHY DO WE FEEL THAT THE AIR IS FRESH AFTER IT RAINS?

PEOPLE living in cities like Mumbai, Delhi and Bangalore are bound to feel that the air is fresh after the first heavy monsoon showers. This is because the bowers bring down from the sky, gases like sulphur dioxide, carbon monoxide, etc. These first monsoon showers, however, cause harm to many freshly planted saplings in these cities.

• THE FILAMENT OF AN ELECTRIC BULB IS HEATED TO VERY HIGH TEMPERATURES. HOW COME IT DOES NOT BUM?

THE filament does not bum because the bulb is filled with inert gases like argon and nitrogen. Oxygen is necessary for any combustion.

• WHAT ARE ASTEROIDS?

• WHO INVENTED THE BICYCLE?

THE first known patent of a machine that resembled a bicycle was given to Jean Theson in 1645. It had four wheels and was driven by two men. The first two-wheeled machine was invented by a Frenchman, Baron Karl de Drais (Baron von Drais) in 1818. But it did not catch on. What caught on was the bicycle, invented by a blacksmith, Kirkpatrick Macmillan of Scotland.

• HOW DO FORESTS HELP TO PREVENT FLOODS?

ONE of the major reasons for floods is erosion of soil from the area near thd banks of

the river. Forests have a dense cluster of trees in them. The roots of the trees hold on to the soil and prevent the erosion. It is therefore important that trees should not be cut indiscriminately, particularly near the banks of the rivers.

• DO VOLCANIC EXPLOSIONS AND EARTHQUAKES OCCUR INSIDE OCEANS ALSO?

The waves that we see in the seas and oceans are mainly caused by air currents. The size of the sea waves depends on the speed of the wind and for how long the wind has been blowing. Tide and ebb are caused by the pull of the moon (and to some extent, the pull of the sun) on the water. Mighty waves like tsunamis are caused by earthquakes below the water surface in seas and oceans.

• WHAT IS VISCOSITY?

Viscosity is a property seen in fluids that offers resistance to a body moving through them. It is equivalent to friction. Whenever a body falls through a viscous fluid, it reaches a terminal velocity or uniform speed due to the viscous force that balances gravity.

• WHY IS IT THAT WE CAN WALK MORE EASILY ON WET SAND THAN ON DRY SAND?

Have you not come across the Newton’s Laws Of Motion? Everyone continues in a state of rest or uniform motional, unless compelled to do otherwise by an impressed (external) force. Walking is possible because the ground on which we walk offers some resistance. Assuming the resistance is zero, the foot that is placed forward will keep moving forward and you will fall. Even dry sand offers some resistance. That is why you can walk on it, if you are careful. Wet sand offers much more resistance and hence you can walk more easily on wet sand.

• WHAT IS A RETRO-ROCKET?

Newton’s first law of motion governs a spaceship travelling in space: It continues to travel at uniform speed. Since there is no reaction in space, a retro-rocket fired in the direction opposite to that of the motion, reduces the speed of the spaceship.

• WHAT IS TORQUEWRENCH?

• AN OTOLARYNGOLOGIST IS A PHYSICIAN. WHAT DOES HE SPECIALISE IN?

An otolaryngology’s is a physician who specializes in the problems of the ear, nose and throat (ENT). Myocardial infarction is the technical term for…? Unique is the application of liquid nitrogen to destroy warts.

• WHAT IS THE WIND CHILL FACTOR?

Wind chill is the rate of loss of body heat due to the motion of air. In simple parlance, a strong wind can make it much colder than the ambient temperature. Paul Siple coined this term in 1939 during an Antarctic expedition.

• WHAT IS EUTROPHICATION?

The process by which water becomes more nourished either by the natural process of maturation or artificial processes.

• WHAT IS A DIAMOND MADE OF?

A 100 million tears ago, when the Earth was cooling carbon deposits were exposed to extreme heat and pressure by molten rocks. These deposits crystallized to form diamond mines. Incidentally, the diamond is the hardest material known to mankind. If so, then how is the diamond cut to various shapes for use in jewellery? Saws made from diamond dust cut the diamond. Over 80 per cent of diamonds are used in the industry itself.

• WHAT IS A RE-ENTRY VEHICLE?

Whenever a spaceship returns to earth, it encounters tremendous friction from the atmosphere that generates heat. In order to ensure the safety of astronauts and the expensive apparatus, the spaceship is shielded by using heat resistant material. Scientists from the former Soviet Union were the first to deploy the re-entry vehicle successfully in the early Sixties.

• WHAT IS OZONE?

Ozone is the allotropic form of oxygen. It is used-in water purification and in treating gangrene. Its presence in the upper atmosphere is crucial as it absorbs energetic ultra-violet radiation. Industrial and vehicular pollution has resulted in the depletion of this life- saving molecule and is a cause of worry for the environmental scientists.

• WHAT IS HYDROPONICS?

Hydroponics is often defined as the cultivation of plants in water. Since many aggregates or media support plant growth the definition has been broadened to read the cultivation of plants without soil Growers use hydroponics techniques due to lack of water supply or fertile farmland. Home gardeners have used it to grow fresh vegetables year round and to grow plants in smaller spaces. Greenhouses and nurseries grow their plants in a soilless, peat- or bark-based growing mix.

• WHAT IS SIDEREAL TIME?

A sidereal year is the length of time it takes the Sun to move from a position relative to a fixed star and back to the same position again, as observed from the same location on Earth. It is equivalent to 365 days, 6 hours, 9 minutes and 11 seconds.

• WHY THE BALLOON IS CALLED THE POOR MAN’S SATELLITE?

Unlike hot air balloons, which are used in sports, the hydrogen filled is used for scientific, metrological and military purposes. They can carry payloads of a few tons. They are extensively used for astronomical observations, especially to study X-Ray emissions from stars.

• WHAT IS CORIOLIS FORCE?

Whenever a body is moving in a circular path, it experiences centripetal force towards the center of the circle. If you walk within a bus that is taking a turn, an additional force acts upon you. It is called the Coriolis force, a force that emanates from two simultaneous motions of the same body.

• WHO IS THE FATHER OF GAS-FILLED LAMPS?

Irving Langmuir studied chemical reactions at high temperatures and low pressures. One of the spin-offs of this research was the development of gas-filled lamps.

• WHAT IS THE DIFFERENCE BETWEEN AN ATOMIC AND A NUCLEAR BOMB9

Nuclear bombs are of two types — those that depend on fission, like atomic bombs, and those that depend on fusion, like hydrogen bombs. The former get their explosive energy from the splitting of atoms in materials like uranium or plutonium, which takes place automatically. On the other hand, hydrogen bombs, which are also known as thermonuclear bombs, depend upon the fusing together of atoms, as is taking place in our sun, to release much vaster quantities of energy than atomic bombs. The fusing requires very high temperatures; hence atomic bombs are generally used as triggers for hydrogen bombs. Hence, every atomic bomb is a nuclear bomb, but every nuclear bomb is not an atomic bomb.

• WHAT IS THE DIFFERENCE BETWEEN CYCLONE, HURRICANE, TORNADO AND TWISTER?

Technically, a cyclone is any kind of circular wind storm. But now, it is only used to describe a strong tropical storm found off of the coast of India. Hurricanes and Typhoons are the same thing, but in different places. On the coast of Florida it is called hurricane. In the Philipines, it is called typhoon. Hurricanes occur in the Atlantic and typhoons, in the Pacific. Basically, hurricanes and typhoons form over water and are huge, while tornados form over land and are much smaller in —size. A tornado is a violent windstorm characterised by a twisting, funnel-shaped cloud. In the United States, twister is used as a a colloquial term for tornado.

• WHEN DOES RESONANCE OCCUR?

Resonance occurs when two or more objects naturally vibrate at the same frequency and the sound produced by one object, causes the other to vibrate. Strings or air columns tuned to vibrate at particular frequencies result in the generation of music. Resonance’s can be destructive too. Making individual parts resonate can damage Bridges. This happens when a strong wind blows or a mechanized army convoy passes over it.

• DO YOU KNOW WHAT HAPPENS WHEN ANTI PARTICLES CLASH?

Every elementary particle is known to have an anti particle with opposite properties. Whenever the two meet, they annihilate each other and give out energy twice the mass of the particle.

• WHO DISCOVERED PIEZO-ELECTRIC EFFECT?

Modern kitchens are equipped with piezo-lighters. Certain substances produce currents when they are subjected to pressure. Pierre Curie, husband of Marie and co-discoverer of radium, was the one who discovered piezoelectricity.

• WHAT IS INERTIA?

1. It is the property of a body to stay in a state of rest or uniform motion unless acted upon by an external agency. It is believed that the mass of a body is the total measure of its inertia. Scientists are conducting experiments    to    distinguish between inertial man and gravitational mass.

• WHO DEVISED THE PRECISE NATURE OF PLANETARY MOTION?

Johannes Kepler, the German astronomer, devised major laws of planetary motion. After 17 years of observation, Kepler found that orbits, of planets around the sun are ellipses and not circles.

• WHY ARE QUARKS IMPORTANT?

“Three quarks to muster mark,” said James Joyce. Indeed, three quarks fuse together to form nucleons: Protons and neutrons that make the atomic nucleus. Quarks are believed to be the basic building blocks of matter.

• WHERE ARE TRANSURANIC ELEMENTS FOUND?

Transuranic elements are not found in nature but have been created artificially in the laboratory. They represent atomic numbers 93 to 109, listed after the last stable element, uranium.

• IN WHAT WAY IS THE NAME DE BROGLIE CONNECTED WITH WAVELENGTH?

1. In modern physics, wave-particle duality of the microscopic world continues to battle the scientists. Light is made of waves but it can also be described as consisting of tiny particles called photons. A sub-atomic particle   can be described as having wave properties. De Broglie, a French physicist, was the first to give a formula for the “wavelength” of the particle.

• WHY THE ROBOT IS NAMED SO?

The word originates in the Slavic “Robota7, meaning compulsory work. Robots are used in hazardous environments. Now robots have also been powered by artificial intelligence.

• WHAT IS PARAFILAX?

1. Parallax is the apparent displacement of an astronomical object due to the change in the field of the observers. The very fact that we observe stars from the surface of the earth instead of its center causes geocentric parallax while heliocentric   parallax   occurs because the observation is carried out from the earth and not from the sun. In modern photography, this term is used to describe the difference between the view of an object through the lens of the camera and one seen through a separate viewfinder.

• WHICH IS THE BIGGEST MISSILE TEST CENTRE IN THE WORLD?

Poker Flat Research Range (PFRR) is the world’s largest, land-based rocket range. It has a chain of downrange flight monitoring, observing and recovery stations from inland Alaska to Spitzbergen in the Arctic Ocean. Poker Flat is a sounding rocket launch facility 30 miles northeast of Fairbanks used for auroral and middle to upper atmospheric research. The Geophysical Institute of the University of Alaska, Fairbanks, operates it.

• HOW DO FORESTS HELP TO PREVENT FLOODS?

ONE of the major reasons for floods is erosion of soil from the area near the banks of the river. F’orests have a dense cluster of trees in them. The roots of the trees hold on to the soil and prevent the erosion. It is therefore important that trees should not be cut indiscriminately, particularly near the banks of the rivers.

• WHY ARE NOBEL PRIZES GIVEN ONLY IN NORWAY AND NOT IN ANY OTHER COUNTRY?

THE Nobel prizes were founded by Alfred Nobel,    Norwegian chemist, engineer and industrialist.

• WHY IS SOME SPACE LEFT BETWEEN RAILS ON THE RAILWAY TRACK?

YOU must have learnt in school that heat expands and cold contracts. This means that as a result of heat, all bodies expand. (There are rare exfor this expansion, a little space is left between rails.

• HOW IS THE INSTRUMENT FOR MEASURING THE INTENSITY OF EARTHQUAKES CALIBRATED?

`The Richter scale is used to measure the magnitude of an earthquake. Magnitude is a measure of an earthquake’s size, but rather than being a direct measure of the intensity of the ground shaking, it is a reflection of the strength of the seismic sound waves emitted by the earthquake, a phenomenon that can be detected at great distances from the earthquake’s epicentre. Because an earthquake’s magnitude can be determined solely

by routine measurements made by seismometers, magnitude has become an important measurement commonly recorded on seismograms. The scale is logarithmic — this means that a factor-of-10 difference in actual earthquake energy corresponds to a difference of one whole number on the scale.

• WHAT ARE SUNSPOTS?

The dark spots on the surface of the sun are called sunspots. These areas are locations for sudden changes in the magnetic environment or the ‘magnetic storms’. They appear darker in contrast to the surrounding areas, hence, the name.

• WHY IS A TRACTOR’S EXHAUST PIPE BENT UPWARDS?

As the exhaust gases of an automobile are hot and tend to rise upwards, an upward bending pipe is the most natural shape, hi a tractor, the driver’s seat is directly behind the engine and usually open. So, a backward-bending exhaust pipe will throw the exhaust gases directly at the driver. The rear part of a tractor is broader than its engine. Even a sideways-bent exhaust pipe will have the same effect. As a tractor has various agricultural attachments and a trailer, the exhaust pipe cannot be extended behind its rear tyres from below its chassis. A tractor works mainly on rough terrain which could damage an exhaust pipe protruding downward from the chassis.

• WHAT IS FUEL CELL TECHNOLOGY?

Fuel cell technology uses the fuel cell, an electrochemical energy conversion device. A fuel cell converts hydrogen and oxygen into water, and in the process it produces electricity With a fuel cell, chemicals constantly flow into the cell so it never goes dead — as long as there, is a flow of chemicals into the cell, the electricity flows out of the cell. Most fuel cells in use today use hydrogen and oxygen as the chemicals.

• WHAT IS THE CAUSE OF DELAY IN SATELLITE COMMUNICATIONS?

The communication satellites are normally geosynchronous. In other words, these satellites have the same period of revolution as that of the earth — 24 hours. To attain this, the satellite is launched at an altitude of 36,000 kms from the earth. The messages, sent by means of radio waves, travel this distance to and fro. Radio waves are transmitted at the speed of light, about 3 lakh kms per second. Therefore, approximately, one quarter of a second is lost in traversing the distance between the earth and the satellite.

• WHAT CONTRIBUTION DID LUIS ALVAREZ MAKE TO MODERN SCIENCE?

This American physicist developed the linear accelerator in 1946 for which he won the Nobel Prize in 1968. He and his son, Walter, first proposed that massive extinctions around the Jurassic — including that of dinosaurs, were caused by the impact of a large space object.

• WHAT IS SPELEOLOGY?

It is the science that explores and studies caves found under the earth’s surface.

• WHAT IS WAVE-PARTICLE DUALITY?

In classical physics, all the physical phenomena concerning light, viz. reflection from a glazed surface, refraction through a prism, interference when two or more sources of light were put together and diffraction, the bending of light along edge of an object, could be explained with the wave theory. But this description does not hold for the microscopic world. In modern physics, light is made of discrete packets of energy.

• WHAT IS THE FARADAY CAGE?

The Faraday Cage, also known as Faraday Shield or Screen, is a network of parallel wires connected to a common conductor at one end to provide electrostatic shielding without affecting electromagnetic waves. The common conductor is usually grounded. It attenuates an electrostatic field, designed to prevent the passage of electromagnetic waves, either containing them in or excluding them from its interior space. It is named after physicist Michael Faraday, who built the first one in 1836.

• WHAT IS A PILOTLESS AIRCRAFT?

A pilotless aircraft, usually an MAV (micro air vehicle), is one which is programmed to go somewhere or do something on its own, or is a remote controlled aircraft piloted from the ground. Most pilotless aircraft are rather small in size. Pilotless aircraft used for dangerous jobs such as spying or exploring new places with a camera, which transmits the data back to the ground. They can be very useful as many are shot down or crash, and thus saving a real pilot’s life.

• WHERE WAS INDIA’S FIRST ELECTRICITY-GENERATING STATION LOCATED?

The 4-5 megawatt hydroelectric power station near Sivasamudram falls of the Cauvery in Karnataka was the first major power station in India. Owned by a few British companies, it was set up by General Electric of the US. It was commissioned in 1902, and its output was mostly meant for the Kolar gold mines, located about 90 miles away much smaller power plants started functioning earlier in different parts of India. The first small hydro power plant, a 130-kilowatt plant, started functioning in 1897 at Darjeeling.

• WHY IS VENUS THE HOTTEST PLANET EVEN THOUGH MERCURY IS CLOSEST TO THE SUN?

The degree of hotness of a planet does not depend on as much on closeness to the Sun as on its atmosphere. Carbon dioxide has the tendency to absorb heat, which in turn increases the temperature. Mercury’s atmosphere does not contain carbon dioxide (because of which all the heat is returned to space). Venus contains a high percentage of carbon dioxide due to which it is hottest planet.

• IS IT TRUE THAT THE SAHARA DESERT EXPANDS BY HALF A MILE SOUTH OF EVERY YEAR?

In the 1970s and 1980s, it was reported that the Sahara desert was expanding southward at a rate of 5 kms per year. But during the last decade USAs NOAA meteorological satellite observed that this ‘desertification’ was a myth. It is not so severe as earlier suspected. The deserts reflect much of the incoming solar radiations as compared to land with vegetation (during cloud-free days). Satellites measure this reflected radiations daily, from which the type of land cover or greenness can be inferred. Analysing such data for several years, it was observed that the Sahara was not expanding.

• IS IT TRUE THAT THE SAHARA DESERT EXTENDS BY HALF A MILE SOUTH EVERY YEAR?

It is true that the Sahara desert is expanding, but not just half a mile. It is extending at a rate of 30 miles south per year! Its stretch is engulfing degraded grasslands. Due to the extreme heat, the vegetation of the area is dying out, which results in more desertification. Thus, every year the area of the Sahara desert is increasing and scientists are working out methods to stop or decrease the rapid change. They say that if this continues, the whole of Africa will turn into a desert one day. Global warming is also a big threat in the expansion of the Sahara.

• WHICH IS THE SMALLEST SUB-ATOMIC PARTICLE?

The smallest particle is the quark, the basic building block of hadrons. There are two types of hadrons: baryons (three quarks) and mesons (one quark, one antiquark). Protons and the neutrons are stable baryons. There are also leptons, a family of elementary particles that includes electrons, muons, tauons, and neutrinos. Neutrinos were originally believed to have zero mass, but they have been found to have a very tiny mass, smaller than any subatomic particle. Calling someone a ‘hadron head’ is considered an insult among physicists.

• WHAT IS THE KUIPER BELT?

The Kuiper Belt is disk-shaped belt of billions of small, icy bodies orbiting the Sun beyond the orbit of Neptune, mostly at distances 30-50 times the Earth’s distance from the Sun. Modern computer simulations show the Kuiper Belt to have been strongly influenced by Jupiter and Neptune.

• WHAT IS A ‘NUCLEAR WINTER’?

The nuclear winter theory, proposed by scientists in 1983 and later on established by the US National Research Council in 1984, states that if only half of the collective nuclear weapons of Russia and US were to explode, they would release such enormous amount of dust, smoke and soot into the at- mosphere that sunlight would be completely blocked. This would continue till these clouds settled and consequently the earth’s temperature would fall, creating a period of abnormal cold and darkness. A nuclear winter is also believed likely after a nuclear war. Essential life processes like photosynthesis would also be fatally affected, endangering plant and animal life.

• WHY IS A TRACTOR’S EXHAUST PIPE BENT UPWARDS?

As the exhaust gases of an automobile are hot and tend to rise upwards, an upward bending pipe is the most natural shape, hi a tractor, the driver’s seat is directly behind the engine and usually open. So, a backward-bending exhaust pipe will throw the exhaust gases directly at the driver. The rear part of a tractor is broader than its engine. Even a sideways-bent exhaust pipe will have the same effect. As a tractor has various agricultural attachments and a trailer, the exhaust pipe cannot be extended behind its rear tyres from below its chassis. A tractor works mainly on rough terrain which could damage an exhaust pipe protruding downward from the chassis.

• WHAT IS FUEL CELL TECHNOLOGY?

Fuel cell technology uses the fuel cell, an electrochemical energy conversion device. A fuel cell converts hydrogen and oxygen into water, and in the process it produces electricity With a fuel cell, chemicals constantly flow into the cell so it never goes dead — as long as there, is a flow of chemicals into the cell, the electricity flows out of the cell. Most fuel cells in use today use hydrogen and oxygen as the chemicals.

• WHAT IS THE DIFFERENCE BETWEEN IRON AND STEEL?

The difference is percentage of carbon, the main alloy element. Those irons containing less than 2% carbon are known as steels while those containing more than 2% carbon are known as pig iron. Pig iron is obtained from iron pre by processing it with coke in a blast furnace. This pig iron is then further processed to reduce the carbon content in different furnaces to obtain steels. These steels can be then further processed to obtain alloy steels, stainless steels by adding elements such as silicon, manganese, chromium, nickel, etc.

• WHAT IS CRUSH DEPTH AND HOW IS IT MEASURED?

Crush or collapse depth is the submerged depth of the ocean at which a submarine will collapse due to the surrounding water pressure. A submarine’s hull is normally constructed of steel or steel alloys to increase the diving depth of submarines. This is normally mathematically calculated; however, it is not always accurate.

• WHAT IS M-THEORY?

The String theory is currently the most promising candidate for a unified theory. It describes free particles as vibrations in strings in space and solves the problem of the

incompatibility of the two fundamental theories (GR & QTF). There are, however, five different string theories. The M-Theory is a theory of which all the five string theories are only different aspects. The M-Theory is an 11-dimensional theory that looks 10 dimensional at some points in its space of parameters. Such a theory could have as a fundamental object a membrane as opposed to a string.

• WHAT ARE MILANKOVITCH CYCLES?

The Pleistocene period in earth history, 1.8 million years to about 10,000 years ago, witnessed profound changes in the earth’s climate characterised by repeated glacial and interglacial events. There were as many as 30 glacial intervals during this period. Milutin Milankovitch, a Serbian astronomer and mathematician, calculated in the early 1930s that the orbital parameters of the earth changed with frequencies of roughly 1,000,00 to 20,000 years. These were responsible for variations in the of solar radiations received on the surface thus causing glacial interglacial climatic changes. The exploration of the ocean floor since the 1960 has indeed identified the above periodicities and proved Milankovitch right.

• WHAT ARE MILANKOVITCH CYCLES?

Astronomer Milutin Milankovitch developed the mathematical formulae upon which these orbital variations are based. He hypothesised that when some parts of the cyclic variations are combined and occur at the same time, they are responsible for major changes to the earth’s climate (even ice ages). A 1976 study, published in the journal ‘Science’ examined deep-sea sediment cores and found that Milankovich’s theory corresponded to periods of climate change. Indeed, ice ages had occurred when the earth was going through different stages of orbital variation.

o        WHEN WAS THE FIRST SPACE SHUTTLE LAUNCHED?

The first space shuttle Columbia was launched into space on April 12, 1981 and landed on Edward Air Force base, California on April 14, 1981. Officially, it’s called the Space Transportation System (STS) and it was the first reusable spacecraft. These shuttles carry payloads for scientific experiments, etc. 

• WHICH PLACE ON EARTH HAS NEVER RECEIVED ANY RAINFALL?

The Atacama Desert, spread between the Pacific Ocean and the Andes mountains in northern Chile has not experienced rain in its entire recorded history. Made up of salt

basins, sand and lava flows, it lacks vegetation or animal life. Its landscape is desolate

and moon-like and has been used to simulate the moon’s surface in some experiments. The Quillagua meteorological station located in this desert has recorded an average annual rainfall of only 0.5 mm during 1964-2001.

• WHAT ARE CFCS? HOW ARE THEY RESPONSIBLE FOR DEPLETION OF THE OZONE LAYER?

THERE is a layer of ozone in the zone 10 kilometre to 50 kilometre above the surface of the earth. This layer of ozone protects life on earth from the harmful ultraviolet radiation in sunlight. CFC stands for chlorofluorocarbons used in refrigeration, air-conditioning, aerosols, etc. When these gases rise up in the atmosphere and reach the ozone layer they destroy it. Over the past ten years, in particular, the debate has been held again and again on this issue and steps have been taken to correct the situation. Many nations have agreed to discontinue the use and production of chloro-fluro carbons for the purpose of refrigeration or air-conditioning.

• I HAVE READ THAT SUN WILL BECOME A RED GIANT AFTER CONSUMING ITS SUPPLY OF HYDROGEN. WHAT WILL HAPPEN TO THE SUN AFTER THIS PHASE?

YES, according to astronomers, the sun is about 5 billion years-old; It is expected that the sun mil consume all the hydrogen in it and become a Red Giant. It will be so big then that it will engulf even the planets around it. Then there will be nuclear reactions, involving the vast Supply of Helium in it (formed from Hydrogen) and the heavier elements. As a result it will become a white dwarf, a star of small radius. It is estimated that the radius will be a hundred times smaller than the present radius. Slowly it will lose its luminosity and become a black dwarf. But stop worrying. It will take at least five billion years for this to happen.

• DIAMOND AND COAL ARE BOTH CARBON. THEN WHY DOES ONLY DIAMOND SHINE?

DIAMOND is carbon in its pure form and is made of the same element as coal. But there is a difference. Diamonds are formed at places at least 120 km below the surface of the earth under the enormous pressure of the rocks and the crust above them. It is true that diamonds have been found in levels higher than this, below the surface of the earth. But it is believed they too were originally formed deep below and shifted to higher points due to erosion of the soil or glacial action. There are diamonds of black colour too. They are not used as ‘gems, but they are useful in making cutting tools in industry.

• WHAT IS THERE BETWEEN THE EARTH AND MARS?

SURROUNDING the earth is its atmosphere. Then there is space. Again as your spacecraft approaches Mars, it will have to pass through the atmosphere around Mars. Unlike the moon, Mars has an atmosphere.

• WHAT IS THE ALTERNATIVE TO PETROLEUM? FROM WHERE SHALL WE MEET OUR ENERGY REQUIREMENTS WHEN THE PETROLEUM RESOURCES ARE EXHAUSTED?

DESCRIBED above is one such resource: solar power. Automobiles which^run on batteries, charged by exposing them to sunlight, already exist. You must be aware that nuclear power reactors are also being established all over the world. Many scientists have expressed the possibility of using hydrogen as a fuel. We are yet to find a cheap way of separating hydrogen from water, which has two atoms of hydrogen and one of oxygen in its molecule. In Holland and Denmark, power is being produced from windmills. In countries like. Japan, power is being produced on a small scale from tidal waves. Let us hope that tomorrow’s generation will learn how to meet its requirements of power.

• WHY IS THERE NO GRAVITATIONAL FORCE ON THE MOON?

THE moon has gravitational force too. The gravitational force exerted by a body depends on its mass. The gravitational force on the moon is about one sixth the gravitational force of the earth.

• WHAT IS THE MACH NUMBER?

The Mach number, in aerodynamics and fluid mechanics, is the ratio of the speed of an object through a fluid (gas or liquid) to the speed of sound in the fluid. The Mach number was named after the Austrian physicist and philosopher Ernst Mach. An airplane travelling at less than Mach 1 is travelling at subsonic speeds; at about Mach 1, transonic, or approximately the speed of sound; and greater than Mach 1, at supersonic speeds.

• WHAT IS A MACH NUMBER?

• WHAT IS THE CHANDRASHEKAR LIMIT?

The maximum limit of 1.44 times the solar mass (or sun’s mass) of a star, to end its life as a white dwarf star, is known as the Chandrashekar Limit. This is the basic principle to determine the future of a star after the red giant phase. The stars with a mass more than 1.44 times the solar mass go through supernova explosions and end their lives as neutron stars or black holes. This limit was discovered by Indian astrophysicist S

Chandrashekar and hence it has been named after him.

o        WHAT IS PLANETARY ALBEDO?

Planetary albedo is the fraction of the incoming light reflected from a surface. A bright surface, such as ice or snow, has a very high albedo (close to 1, which would represent total reflection), whereas a dark surface, such as coal or soot, has a very low. albedo (close to 0, which would represent complete absorption). In the solar system, the Moon, which has a bare, rocky surface, has an average albedo of 0.12 (reflects 12 per cent of the light hitting it). The Earth, which is partly cloud-covered, has an average albedo of 0.37, while the albedo of Venus, which is completely cloud-covered, is O.65.

• WHAT IS THE CHANDRASEKHAR LIMIT?

In the 1930s, Subramanya Chandrasekhar, now recognised as the founder of relativistic astrophysics, address the important question: What happens to a star once it has burnt all its nuclear fuel? Chadrasekhar’s answer was that it depends on the mass of the burnt core left behind. If the mass of this core (mind you, not the mass of the shining star) is less than 1.4 times the mass of the sun, the core will retire as a white dwarf star. Immediately above this limit, say up to three times the solar mass, the core will become a neutron star. If the mass of the core is still higher, a black hole will be formed. In an ordinary shining star, the force of gravitation is balanced by nuclear reactions. In white dwarf and neutron stars, by complex quantum forces. In a black hole, gravitation dominates. For this pioneering work Chandrasekhar belatedly received the Nobel Prize for Physics in 1983.

• HOW MANY PERSONS HAVE SET FOOT ON THE MOON?

Only twelve people have walked oh the Moon, each on one mission only. Nobody has walked on the lunar surface since 1972. The lucky astronauts are: Neil Armstrong, Edwin Aldrin, Charles Conrad, Alan Bean, Alan Shepard, Edgar Mitchell, David Scott, James Irwin, John Young, Charles Duke, Eugene Cernan and Harrison Schmitt.

• IS A RAY OF LIGHT VISIBLE IN VACUUM?

No, rays of light cannot be seen in vacuum. When a ray of light enters an enclosed dark room through an opening, light is scattered by dust particles suspended in the air and thus we see the path of the ray Actually we see the dust particles falling substance which can scatter the light. This explains the darkness in space though there are many light sources. We can see only the light sources and the objects, which fall in the path of rays.

• ON WHAT PRINCIPLE DOES AN ALTIMETER WORK?

There are basically two types of altimeters— pressure altimeters and radio altimeters. Pressure altimeters are aneroid barometers calibrated to indicate altitude instead of pressure. It is based on the principle of drop of atmospheric pressure with gain of height. The corrugated capsules inside the casing expand with gain of height. This expansion is magnified with the help of gears and levers to move the indicator over the dial. The mean sea level pressure is 1013.2 millibars or 29.92 inches of mercury which is taken as zero altitude and there is drop of 1 millibar for every 32 feet (approximately) gain of height. The instrument is calibrated accordingly to indicate loss/ gain of pressure in terms of height gained or lost. Depending on the pressure setting or datum, the instrument reads altitude (above MSL) or absolute altitude height (above ground level — AGL). A radio altimeter is a radar aid, which is effective only from 20 ft to 2,500 ft. It is basically used as a ground proximity warning system in mountainous terrain.

o        WHAT ARE PSEUDOHALOGENS?

Pseudohalogens are groups formed by combination of two or more P block elements (in the periodic table) with a unit negative charge e.g. CN- (CN Minus) cyanide group a combination of carbon and nitrogen with nonnegative charge. They are called pseudohalogens as they form covalent compounds, complexes similar to the halogens, the 17th group elements in the periodic table. They differ from halogens as they are able to polymerise unlike halogens and their complexes are not paramagnetic.

• HOW DOES THE INTERNATIONAL SPACE STATION MANAGE ITS WATER AND OXYGEN NEEDS?

The ISS’s Environmental Control and Life Support System (ECLSS) helps in water and oxygen management for the astronauts. The ECLSS Water Recycling System (WRS) reclaims waste water from the shuttle’s fuel cells, from urine, from oral hygiene and hand washing, and by condensing humidity from the air. Without such careful recycling, 40,000 pounds per year of water from the Earth would be required to resupply a minimum of four crewmembers for the life of the station. The primary source of oxygen is water electrolysis, followed by oxygen in a pressurised storage tank. Hydrogen left over from splitting water is vented into space. In ECLSS hardware racks, there is a machine that combines the hydrogen with excess carbon dioxide from the air in a chemical reaction that produces water and methane.

• HOW IS ZERO GRAVITY CREATED ON EARTH?

Zero gravity conditions result in weightlessness and the body begins to float in an enclosed space. A more precise term is microgravity or reduced gravity NASA’s C-9B aircraft and Zero Gravity Corporation’s modified Boeing 727 create these conditions by flying in long, parabolic arcs. By changing the flight path, they are able to create different values of g-force and therefore varying degrees of apparent gravity. More individuals are experiencing these conditions in preparation for space tourism or for adventure.

• WHAT IS THE NAME OF THE TENTH PLANET?

The tenth planet in the outer solar system was discovered recently. Right now, it’s about 97 times further from the sun than the Earth and it’s the farthest-known object in the solar system. Mike Brown (California Institute of Technology) along with colleagues Chad Trujillo (Gemini Observatory, Hawaii) and David Rabinowitz (Yale University) discovered it. It goes under the temporary name of 2003UB313; a new name has been proposed to the International Astronomical Union.

• WHAT EFFECT DO OCEAN CURRENTS HAVE ON THE EARTH’S WEATHER?

Ocean water and currents affect the climate. Because it takes far more energy to change the temperature of water than land or air, water warms up and cools off much more slowly than either. As a result, inland climates are subject to more extreme temperature ranges than coastal climates, which are insulated by nearby water. The ocean’s surface layer, so surface currents move a lot of heat, absorbs over half the heat that reaches the earth from the sun. Currents that originate near the equator are warm; currents that flow from the poles are cold.

• WHY DO STARS TWINKLE AT NIGHT?

Stars seem to twinkle or change their brightness all the time. In fact, most stars shine with a steady light. The movement of air (sometimes called turbulence) in the Earth’s atmosphere causes the starlight to get slightly bent as it travels from the distant star through the atmosphere to us on the ground. Some of the light reaches us directly but some gets bent slightly. This gives the illusion of twinkling. Stars closer to the horizon appear to twinkle more than others. This is because the atmosphere is a lot denser near the horizon than between the Earth and a star higher in the sky.

• HOW DO WE KNOW ABOUT THE EXISTENCE OF PLANETS MILLIONS OF MILES AWAY FROM US?

Planets like Pluto in the outer reaches of our solar system can be viewed and photographed by powerful optical telescopes. Distant extra-solar planets, many light years away from our Sun, cannot be captured even by high resolution telescopes. Big planets orbiting close to a star can exercise a very small gravitational pull on the parent star. This causes a minute wobble in the rotation of the parent star which can be detected by highly sensitive spectroscope monitors. The existence of the planet can thus be only indirectly visualized.

• HOW DO ASTRONAUTS COMMUNICATE IN SPACE?

• HOW IS ZERO GRAVITY SIMULATED?

Simulation of zero gravity while still within the pull of the earth’s gravity is achieved in a similar manner to that of a man-made satellite. When a body moves in a circular path, it experiences centrifugal force acting on it. This force points radially outwards and depends on both the speed and the radius of trajectory. Given this factor, if a plane flies in a circular arc trajectory, then passengers experience a centrifugal force pointing away from the earth. At a certain velocity, this force exactly counterbalances gravity, and passengers experience weightlessness or zero gravity.

• HOW MANY SATELLITES ARE CURRENTLY REVOLVING, AROUND THE EARTH?

Although anything in the Earth’s orbit is technically called a satellite, the term is typically used to describe a useful object placed in orbit purposely to perform some specific mission or task. Approximately 23,000 items of space junk objects that were inadvertently placed in orbit or have outlived their usefulness are floating above the Earth. The actual number varies depending on which agency is counting. Pay loads that go into the wrong orbit, satellites with run-down batteries, and leftover rocket boosters all contribute to the count. This count is almost 26,000.

• WHY DO SOME PEOPLE HAVE ‘RED EYE’ IN PHOTOGRAPHS?

Light, usually from a camera flash, enters the subject’s eyes and reflects it back into the lens. The red colour comes from the colouration of the retina which is lined with blood vessels. To prevent ‘red eye’, the feedback chain of light should be interrupted. The most effective way is to use indirect or off-camera lighting, which causes reflection from the eye to veer away from “^the lens. Another cure is to reduce the size of the pupils of your subject’s eyes, effectively preventing the bounce-back syndrome. This is why some camera models fire one or more pre-flashes before taking a picture; the smaller flashes are meant to adjust the eyes to bright light, decreasing the pupil size.

• WHAT IS THE COMPOSITION OF SAND?

1. Sand is a non-cohesive, loose granular material which comes from rocks as a result of attrition of bigger rock pieces by water or wind in favourable weather conditions. The composition of sand depends   on   the   parent rock; the most common minerals being silica and feldspar. Less common minerals are iron. Silica comes in the form of quartz and feldspar consists of plagioclase. Additional mineral fragments are rare and include Muscovite, chlorite, epidote, garnet and zircon. Some deposits of sand may contain magnetite, glauconite or gypsum. Sands rich in magnetite are dark in colour, while those rich in gypsum have a green tinge.

• WHAT’S THE ORIGIN OF THE WORD MONSOON?

The word monsoon comes from the Arabic word mausim, which means weather. Owing to the yearly appearance of torrential rain, indicating a marked shift in weather, mausim gradually became monsoon.

• WHAT ARE FULLERENES?

Fullerenes are one of the three allotropes (same element in two or more forms) of carbon. The other two are diamond and graphite. Scientists Kroto, Smalley and Curl discovered fullerenes in Rice University in September 1985. One of the fullerenes — Buckminsterfullerene — consists of 60 carbon atoms linked together to form an almost spherical C60 molecule of joined hexagons (20) and pentagons (12). The bonds have the same arrangement as the panels on a football. Fullerenes can be prepared by passing an electric discharge through graphite rods in an atmosphere of helium. It is now known that a buckminsterfullerene is likely to be formed in sooty flames.

• WHAT IS MICROLENSING?

According to Einstein’s Theory of General Relativity, light possesses mass. When light passes close to a massive object, it is attracted towards it and its direction changes towards it. Therefore, when an astronomical body is between the earth and another bigger, more distant astronomical object, the light coming towards the earth from the distant body gets focused on the earth because of the gravitational attraction of the intermediate body This is somewhat similar to focusing light from the sun on a piece of paper through a lens, and hence called astronomical microlensing. Astronomers use microlensing in their search for new planets, and to observe distant, faint objects and neutron stars.

• WHAT IS WATER MEMORY? ,

Water is said to have the power of memory — if certain chemicals are dissolved in water and then completely removed through a chemical process, the water may still retain some properties of the dissolved chemicals. Although this concept seems difficult to accept or comprehend, French scientist Jacques Benveniste allegedly proved it. However, other scientist could never replicate this experiment.

• WHAT IS THE DIFFERENCE BETWEEN SECOND GENERATION AND THIRD GENERATION TECHNOLOGY?

The main difference between second generation (2G) and third generation (3G) technology is data. 2G services were developed with mostly voice services in mind, but are capable of providing relatively slow (14.4kbps) speed data services. Most US service providers offer some data services, including limited wireless Internet access. For 3G, the data speeds are expected to be much higher; up to 2 mbps for fixed applications and 384 kbps for mobile applications. This will support advanced features including audio and video streaming, remote access to company databases, and a wider variety of entertainment and information services. 3G will also support a range of devices, including phones, personal digital assistants, and laptop computers.

• WHAT IS THE SIGNIFICANCE OF RED RAIN?

Five years ago, scarlet rainfall was reported in a town called Chenganacherry in Kerala’s Kottayam district. Research scientists at the Mahatma Gandhi University in Kerala investigated this peculiar phenomenon and discovered that the rain contained cell-like particles, which they claim, are not from Earth but from outer space. The scientists conjecture that a comet that exploded over the sky caused the airburst that created the red rain

• WHY HORSE POWER IS CALLED SO?

When the steam engine began to do the work of horses in the mines during the early 1800s, the mine owners began to ask how many horses an engine would replace. James Watt, who invented steam engines, figured out a mathematical way to equate horses to engine power. Thus the term horsepower was invented. Watt measured the capability of a big horse to pull a load and found it could pull a weight of 150-pounds while walking at 2.5 miles per hour. This works out to 33,000 foot-pounds per minute or 550 foot-pounds per second.

• WHAT IS LIQUID OXYGEN USED FOR?

• WHO INVENTED THE ESCALATOR?

The basic mechanism of an escalator f was. first invented by Jess W Reno of ‘the US in 1881. It was used mainly for riding on masts of wooden or iron poles in ships to fasten ropes or belts to support the sails. The name ‘escalator’ was applied to a moving stairway in 1900and first shown in a Paris exhibition. Charles Seeberger, with a company named Otis Elevator Company, built the first commercial escalator.

• WHY IS NASA’S DAWN MISSION SIGNIFICANT?

The Dawn Mission is important because it will study Ceres and Vesta, two of our solar system’s largest asteroids in the belt between Mars and Jupiter. The spacecraft is scheduled for launch in July 2007 and will capture images of the surface of these asteroids and probe the composition, density and magnetism. The project almost got scuttled because of cost considerations but got a fresh lease of life recently

• HOW DOES THE GROUND PROXIMITY WARNING SYSTEM IN AN AIRCRAFT WORK?

Ground Proximity Warning System (GPWS) is designed to alert pilots if their aircraft is in immediate danger of Hying into the ground. Another common name is Ground Collision Warning System. Don Bateman is credited with inventing GPWS. This system monitors an aircraft’s height above the ground as determined by the radio altimeter. A computer tracks these readings, calculates trends, and warns the captain with visual and audio messages if the aircraft exceeds certain thresholds or defined flying configurations also known as modes. The modes are: excessive descent rate, excessive .terrain closure rate, altitude loss after take-off, unsafe terrain clearance and excessive deviation below glidescope. Corrective action is then taken.

• WHAT IS A PYROMETER?

A pyrometer, invented by Josiah Wedgwood, is an instrument which measures relatively high temperatures, like that of a furnace. Many pyrometers work by measuring the radiation from the body whose temperature is to be measured. There is another device known as the optical pyrometer. It measures the temperature of glowing bodies by comparing them visually with an incandescent filament of known temperature. Another type is the resistance pyrometer in which a fine wire is in contact with the object and its temperature is determined by measuring its electrical resistance.

• WHAT IS WHITE COAL?

White coal is a form of fuel produced by drying chopped wood over a fire. It differs from charcoal which is carbonised wood White coal was used in England to smelt lead ore from the mid-16th to the late 17th centuries. It produces more heat than but less than charcoal and thus prevents lead evaporating. White coal was produced in distinctive circular pits with a channel, known as Q-pits They are frequently found in the woods 7f South Yorkshire.

• WHAT IS THE MEANING OF GEOSTATIONARY SATELLITE?

A geostationary satellite means a satellite, which moves in space at the same speed and in the same direction as the earth. As a result, its position is fixed in relation to any spot on the earth.

• IF THE SUN IS A STAR, WHY DOESN’T IT TWINKLE?

THE sun is an ordinary star. There are stars many times bigger than the sun. The stars that you see twinkling are so far away, that the light from them takes thousands of years to reach us. Even the light from the nearest star, Proxima Centauri, takes about three to four years to reach us. The light from the stars seems to twinkle because it comes through the constantly moving air currents around the earth. The sun does not twinkle because it is very close to us —just about 150 million kilometres away.

• HOW DID THE OZONE LAYER GET DEPLETED?

THE ozone layer got depleted because of chemicals released into the atmosphere by man, particularly chlorofluoro carbons used in the refrigeration industry and air conditioners.

• WHAT IS A TRANSDUCER?

A transducer is a contraption by instrumentation engineers to convert a physical action into an equivalent electrical signal.

• WHAT IS AN EXOTHERMIC REACTION?

Exothermic is an adjective pertaining to a chemical change that is accompanied by liberation of energy in the form of heat.

• WHAT ARE CONIC SECTIONS?

In geometry, circle, ellipse, parabola, hyperbola and a pair of straight lines are called conic sections as these geometrical entities can be obtained by slicing a cone.

• WHAT IS MARCODONTIA?

It is rare case of unusually large teeth found in otherwise normal person.

• WHAT IS RESIDUAL STRESS?

It is a stress in metal, on a microscopic scale, resulting from nonuniform thermal changes and plassic deformation.

• WHAT IS A GM COUNTER?

GM or Geiger-Mueller Counter is an instrument used in measurement of radioactivity. It is a cylindrical structure filled with inert gas and a central wire maintained at ultra-high voltage. The impinging radiationionises the inert gas and creates a shower a charged particles. This change can be electronic gadgets such as a computer.

• WHICH FLOWER IS KNOWN AS THE FLOWER OF THE NIGHT?

The flower of a type of cactus called orchid cactus, (Epiphyllum oxypetallum), is known as the “flower of the night” or the “queen of the night”. This cactus is native to Central and South America. It possesses what appear to be flat leaves, which are actually stems, on which the flower blooms directly In Greek, “epiphyllum” means “upon the leaf”. This cactus flowers once a year, and the flower opens only for one night. When the flower blooms, it fills its surroundings with a strong scent, and hence the name.

• WHAT IS GODEPS THEOREM?

Austrian-born American mathematician Kurt Godel proved that within a rigid logical mathematical system, there are certain questions that can neither be proved nor be disproved on the basis of the axioms of the system. Godel’s theorem, in essence, goes beyond the realm of .

• DO YOU KNOW THE MEANING OF CHIRALITY?

If the mirror image of a natural object is different from the object itself, the object is called a chiral / objects. A perfect sphere is not chiral. Scientists are studying basic building blocks of matter to understand the fundamental reason for this amazing property.

• IS THERE ANYTHING YELLOW ABOUT THE YELLOW SEA?

The Yellow Sea is an arm of the Pacific Ocean that extends inland for about 400 miles between the east coast of China and Korea. The Chinese named this area the Huang Hal (Yellow Sea) because the waters along the banks are a yellow, muddy color. The Huang River carries deposits of yellow earth (huangtu) to the Yellow Sea, which thereby gets its name.

• WHAT IS BLACK ABOUT THE BLACK SEA?

The deep water of the Black Sea is supposed to be darker than the water of a normal sea, because the Black Sea has rich concentration of micro algae. Further, the Black Sea was called so in olden times, perhaps because it was very stormy and hence difficult to navigate. It was considered an inhospitable sea because barbarians occupied its shores. According to another theory, the Black Sea is called so because it is on the northern side of the Mediterranean Sea, and in ancient times the colour black was used in the compass to mark north.

• IS THERE ANYTHING RED ABOUT RED SEA?

The Red Sea is not actually red in colour. The Red Sea, located between the African coast and Saudi Arabia, contains a type of algae called Trichodesmium eythraeum. As they die, their remains end up on the ocean floor. THEIR COLOUR CHANGES TO REDDISH-BROWN AND THIS GIVES THE SEA A ‘RED’ COLOUR.

• WHAT’S UNIQUE ABOUT SPACE VEHICLE ORION?

Orion is the new moonship that NASA plans to develop. This was revealed when US astronaut Jeff Williams inadvertently mentioned the name of the vehicle while taping a message for a space agency when floating 354 kms above the earth in the International Space Station. It was transmitted by accident over space-to-ground radio.

• WHAT IS A PUFFER MACHINE?

A puffer machine, formally named an explosives detection trace portal, is a security device that detects explosives at airports and other sensitive facilities. The machine operates by releasing multiple puffs of air at a passenger standing upright in the machine. The cool air blasts are felt by the passenger, but are not painful or otherwise damaging. The purpose of the series of air blasts is to release microscopic particles into the air, such as gunpowder or residue from bomb-making materials, which would then be detected by the machine. If such particles are suspected, the passenger may be retained for further screening. The entire process takes approximately 15 seconds.

• WHY IS THE TRAJECTORY OF PLUTO DIFFERENT FROM ALL OTHER PLANETS?

The peculiarity of Pluto’s trajectory is that both its eccentricity and inclination to the ecliptic, the approximate plane in which the orbits of the other planets lie, are extremely high. As Pluto was discovered only in 1930, astronomers haven’t been able to fully explain the peculiarity of its orbit. A hypothesis proposed that it was originally a moon to Neptune, and later somehow escaped from Neptune’s gravity In 1978, when Pluto’s moon, Charon, was discovered, new theories were proposed regarding the origin of both Pluto and Charon. It is now believed that *both of them were formed independently, but after some time there was a collision between Pluto and the original Charon. From the debris of that collision,

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Watt’s Up RC Watt Meter & Power Analyzer WU100 Version 2 — SALE! $54.00 # Specifications: # Voltage 0-60 V, resolution 0.01 V. That’s a 14 cell series li-poly pack! # Current 0-100 A peak, 50 A continuous, resolution 0.01 A # Charge 0-65 Ah, resolution 0.001 Ah. That’s ~32 Amps for two hours! # Power 0-6500 W, resolution 0.1 W. That’s ~8.7 Horsepower! # Energy 0-6500 Wh, resolution 0.1 Wh. # Operates from 4.0-60 V, 0 V with optional receiver battery pack # 16 x 2 STN…

Snap-on Industrial Brand CDI Torque 1002CF3 Drive Computorq 3 Electronic Torque Wrench, 3/8-Inch $288.99 3/8″ Drive Computorq III Electronic Torque Wrench – 5.0-100.0 Ft/Lb / 120-1200 In/Lb / 13.6-135.6 Nm / 138-1382 Kg.Cm.The COMPUTORQ3 Electronic Torque Wrench is a simple to use digital readout wrench that displays real time torque values in any of four torque units, ft.lbs., in.lbs., Nm, kg.cm. Simply set the desired torque value and apply force until the green LED illuminates. Great for light in…

CABLES TO GO WP DBL ALUM HD-15 3.5MM A/V 4 KEYSTONE Audio/Video Feed Through Wall Plates $44.59 Feed-through connectors and engraved identification markings make these wall plates simple to install and easy to use. Compatible with new or existing wiring networks, this single gang design offers connectors for HD-15, 3.5mm stereo audio, composite video, left/right stereo audio, and four keystones — all in one wall plate. The feed-through connectors are designed to offer low-loss signal tran…

The New Sport Infared Micro SIze R/C Indoor Remote Controlled Airplane Radio Control R/C Indoor Glider The Sport Indoor Mini RC Electric Airplane is the world’s smallest mass-produced radio controlled aircraft! With a wing span of only 8 inches and a elliptically curved polyhedral and molded-in airfoil this tiny plane has incredible maneuverability. The Sport Flyer flies for over 5 minutes on a single charge. Fly this Micro Flyer indoors, outdoors with a clam day wit…

Hobbyzone Champ RTF Airplane $77.49 Teach yourself to fly in your own backyard with the 3-channel HobbyZone® Champ RTF. With its compact size, durable construction, and gentle flight characteristics, the Champ takes the stress out of teaching yourself to fly….

Syma New S022 Big CH-47 Chinook 3 Channels RC Helicopter $42.95 The Famous Syma New S022 Big 3CH RC Chinook. Factory pre-assembled, Ready To Fly! Simply remove it from the box, charge and insert the batteries, and get ready to take-off. The package is equipped with everything needed to get airborne (except 6AA batteries for the transmitter). Once again, just simply take it out of the box, set the batteries, and you have lift-off anywhere you want! Now everyo…

Parrot AR.Drone Quadricopter Controlled by iPod touch, iPhone, iPad, and Android Devices (Orange/Blue) $249.00 The AR.Drone remote-control quadricopter is a groundbreaking device combining the best of many worlds, including modeling, video gaming, and augmented reality. The AR.Drone is remote-controlled by an iPhone and features a number of sensors, including a front camera, vertical camera, and an ultrasound altimeter. The AR.Drone can also be used in video games, such as AR.FlyingAce, a dogfight between …

Flying Models: Rubber, CO2, Electric & Micro Radio Control – Tips & Techniques for Beginner & Expert, Book 2 $19.95 GREAT CONDITION, WILL SHIP FAST!!…

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E-Flite Cub 25

E-Flite Cub 25

The 25 Wishes…!!!

Without much a-do…I’d just start up with what I have always wanted, but waited to say:

1. “Life’s way too short for keeping grudges. Have a good time, Never wish bad on others, Forgive but never forget and be the best that you can be!” .. 
I am Praneet Arora & I absolutely Love the fact that I am a Punjabi!

2. “Whatever I am, or ever hope to be, is because of my God-like parents, Love them!”… ) aww this line isn’t mine, I stole it… but it goes so perfectly well with me too! =) … & I’m blessed with wonderful friends! They’re me life!  

3. I can daydream for hours & hours on end, it’s my best pastime!

4. I have that one pair of “middle-finger to the world” jeans which I truly madly deeply love & it’s my obsession! It’s bruised, battered, braised & tortured… It’s torn in places, its folds are shredded & the seams of its edges are falling apart… It has 7 pockets & I can carry my world in it… My friends call it “The Warehouse”… It has “touch Me I’m Famous” written on the inside & its of the ‘altered-Ego’ series… & it’s so worn out now that I can tear its denim apart with my bare hands .. No kidding ..!!.. I love it & I’ll keep it with me forever!

5. I’m kind of good in messing up things… take my engineering for example!

6. I feed & live on Trance! Can get high on listening to it alone! Trance’s got to be one of the greatest creations ever ever ever created! BUT this doesn’t mean I don’t like other genres of music… Me loves something of everything! & Yes, some songs move you from the inside… & they’re beautiful… Someone has rightly said “Music is what feelings sound like”… it’s so darn true! & I want to play the electric guitar like Joe Satriani does..!

7. I wish my voice was like that of Jason Wade’s…

8. I sleep with a kingsize cushion under my head & 3-4 fluffy pillows on my side, I sleep like a baby! 

9. I love clicking pictures! Love Photography! I have a baby monster of a camera, the Sony DSC-H50 w/ me right now… & I’m hoping to upgrade to a DSLR one as soon as I can! 

10. Driving is what my passion is, I’m driven by the sound of the roaring exhaust… the sound of the Shelby GT-500 reaching 10500rpm has got to be the best sound on planet Earth! (Ahhh…sweet music!) ..& I hope to own the Lamborghini Gallardo Superleggera someday, & a red Honda CBR1000RR also, & if possible, a DODGE Monster truck with a HEMI engine too..!! ..& yea, I hate traffic like hell.

11. If I had money to blew, I’d shred my ride’s tires & burn its clutch plates in 8 days flat…! Lol  … & yeah, even my pram used to wheelie!

12. I have a huggeeee wish list! right now it includes the unbelievable Canon camera which I checked out the other day & is worth 3.5 frigging lac rupees! I also want Head play’s Personal home theatre system with all the goodies, a RC scale F-16 jet!, & then I want Bose triports, Xtreme Mac FS1 earphones, a Bang & olfusen top-of-the-line audio setup!, ummm Nokia N97, a moon roof fitted in my car, play station 3, Ground-Zero subs, a customized chopper in viper blue color, Porsche Design sunglasses, Harry Winston Z5 timepiece, a monoblok amp for my present sub..& then I want the power to go through all my course books, the power to Study!

13. There are places on earth where I can just sit, indefinitely, doing nothing.

14. I am VERY Moody… I think, alot actually, which sometimes doesn’t do good & yea, if I hold onto something, like really hold onto something, I hold onto it forever … 

15. Baby Polar bears, meerkat’s pups & tiger cubs are the cutest little things! Me wants to keep a tiger cub as a pet someday… & you know what I’ll call it?!? ..I’ll call it “Tiger”…haha  … No I’ll think of something better by then ..!

16. I love Rain, & the sound of it falling on a tin roof, I love the sweet mitti wali smell after it has rained, & I love stormy overcast skies & the sun-rays filtering through sometimes ..,& that silver lining also!! & then I love mountains & lonely beaches & those golden dried autumn leaves which fall off & cover the roads… & the sound of gushing brooks, the sound of rustling trees on a windy day & yea, Sunsets & full moon!!

17. Hate people spitting on the road, it’s disgusting! Eww! Some people are just so damn good in being pathetic…

18) I Love this number (!!).

19. I am almost always hungry, & sweet spicy crispy chicken of Mainland China is Heaven! mmmm! & that’s what I’m craving for right now…!

20. I am God-loving & God-fearing too.

21. The fact that I have so much music & so little time to listen to it sucks.

22. I love collecting perfumes! There was a time when I owned 118 fragrances, all awesome ones!

23. The only regret I have in life is not being a 6ft tall guy…

24. I hope someday I’ll own big huge farmlands in New Zealand, with a beautiful cottage in the middle of it… & I’ll also build a ranch which will have awesome stud horses, I guess by that time I’ll learn horse riding too!.. & yea, I also want to own a stylish studio apt in the middle of Manhattan overlooking the central park… I’ll also travel the world someday (that includes the area above the artic circle)… I want to witness the northern aurora lights at least once in my life.

25. I Love SUNSHINE!!!

I could probably go on and write another 2500 things about me here, but guess that would be overkill!! Ha-ha

 

 

About the Author

Praneet Arora is a freelance Poet | Artist | S/W & Web Developer | Security & Research Analyst | White Hat Hacker | SEO

E-Flite J3 Cub Flight #1

3.7V 160mAh 15C LiPo Batteries for Micro Helicopters E-flite MSR /SR/ BMCX $3.99 Tenergy 160 Mah 1S LIPO battery used mainly with E-flite MSR /SR helicopter and with E-flite 4-SITE bi-plane and even better with ParkZone Sukhoi 26M 3D plane. Will give more PUNCH and ROBUST performance due to its higher current output and power. Features and Benefits * Single cell Li-Polymer 160mAh battery. * Capacity: 160mAh * Voltage: 3.7V * Discharge rate: 15C * Dimensions: 44x12x6mm …

E-Flite J-3 Cub 25 ARF RC Airplane $174.99 Aimed at the scale electric enthusiast, the J-3 Cub 25 ARF from E-flite is at the top of its class for scale appearance and performance, including scale ailerons—the only J-3 Cub on the market to have that feature….

Fuselage: Super Cub 25e $124.36 …

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Electric Mini Helicopters

Electric Mini Helicopters

5 Types Of Remote Control Helicopter

If you are thinking of what particular remote control helicopter to buy, then this article should help.

Here are the different types of remote control helicopter:

Gas remote control helicopter – If you are thinking of flying a helicopter that somehow close to flying a real helicopter, then the gas remote control helicopter is for you. Made with an engine and powered by gas, this helicopter is the most advanced remote control helicopter to buy. Gas remote control helicopter does not come cheap with engine and more complicated moving parts. Gas remote control helicopter is for advanced rc pilot.

Electric remote control helicopter – Early electric remote control helicopters released are expensive but later models are more affordable. This makes electric remote control helicopters more popular than any type of remote control helicopters in the market. It is easy to fly. It creates no noise and smell not like the gas remote control helicopter. It is powered by a rechargeable battery. The electric remote control helicopter is suitable for beginners.

Mini remote control helicopter – Also powered by battery, this type of remote control helicopter is similar to the electric rc helicopter. In fact, it is hard to define if the electric remote control helicopter falls on the category of a mini. But to be safe about it, you can say that it is mini if you can fly it on your living room without imposing danger on your furniture.

Mini remote control helicopter is fun to fly although controlling it on air might be a little complicated at first. But once you get the hang of it, maneuvers and landings are easy. It is also far more affordable than the two mentioned types of remote control helicopter.

Micro remote control helicopter – If you have seen micro rc car, micro rc boat, and micro rc plane, then you should not be surprised if you see micro remote control helicopter. This tiny piece of aircraft can stretch up to 8 inches. But, you cannot consider it a toy. It has standard features similar to that of a standard remote control helicopter. It is so tiny that makes it look so delicate but in face, materials used such as titanium and carbon is strong.

Toy remote control helicopter – If you want an affordable remote control helicopter, then this one is for you. Only remember that to fly this type of remote control helicopter requires a lot of practice.

About the Author

This content is provided by Low Jeremy. It may be used only in its entirety with all links included. For more information on RC Helicopter & other useful information, please visit
http://rc-helicopter.articlekeep.com

Parrot AR.Drone Quadricopter Controlled by iPod touch, iPhone, iPad, and Android Devices (Orange/Blue) $249.00 The AR.Drone remote-control quadricopter is a groundbreaking device combining the best of many worlds, including modeling, video gaming, and augmented reality. The AR.Drone is remote-controlled by an iPhone and features a number of sensors, including a front camera, vertical camera, and an ultrasound altimeter. The AR.Drone can also be used in video games, such as AR.FlyingAce, a dogfight between …

Crystal Hard Black Cover With Blue Flowers Design Case for LG Xenon GR500 (At&t) [WCL180] …

Hawk 3 Channel RTF RC Electric Helicopter $85.00 Now the amazing experience of real helicopter flight can be enjoyed by everyone. This 3-Channel R/C Helicopter is fully assembled with all pre-flight adjustments completed. The twin, counter-rotating, main rotor blade design that totally cancels out main-rotor torque forces normally encountered with traditional helicopter types, the result is giving you a very stable and gentle flight characterist…

Syma S107/S107G R/C Helicopter – Blue $18.93 Syma S107G is equipped with a 4-in-1 infra-red receiver (Gyro, ESC, Mixer, Receiver). This palm size S107 Toy Helicopter (18.5cm long) comes with Aluminum Frame and a Great detail canopy, it doesn’t look like a toy, but a very serious Helicopter. It is able to move in 3 Direction base on the 3 Channels, anyone can hover it easily. Since it is made with Aluminum Frame, very light weight and almost …

Syma S107/S107G R/C Helicopter – Yellow $16.99 The brand new GYRO S107 3.5CH Mini RTF RC Helicopter comes with the greatest advancement in Helicopter Technology, a Gyro. No more crashing, no more replacing parts, the GYRO has changed the Helicopter industry completely, making this RC Helicopter super easy to fly and maneuver. Great for people of all skill levels, this bad boy features a coaxial rotor a single rear rotor for precise movement an…

Syma S107/S107G R/C Helicopter – Red $16.99 Syma S107G is equipped with a 4-in-1 infra-red receiver (Gyro, ESC, Mixer, Receiver). This palm size S107 Toy Helicopter (18.5cm long) comes with Aluminum Frame and a Great detail canopy, it doesn’t look like a toy, but a very serious Helicopter. It is able to move in 3 Direction base on the 3 Channels, anyone can hover it easily. Since it is made with Aluminum Frame, very light weight and almost …

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Electric Jet Aircraft

Electric Jet Aircraft

Jet Engine Question. Electric Jet Engine Possible?

I was wondering if it would be possibble to build an electric jet engine. I realize that combustion plays an integral part in propulsion, but is there anyway to bypass this? Does anyone have an idea for a different kind of propulsion aircraft could use, even if it seems far off.

NO. Not a true jet engine. If it had an electric motor, then it would just be spinning the blades. No need to compress the air like a jet engine does. It would be a ducted fan with an electric motor. You can buy RC planes with ducted fans. Electric ones.

A jet engine works like this. Suck, squeeze, bang, blow. Air is sucked into the engine and compressed. The first stage is the compressor. When air is compressed, it gets super hot. Air is also tapped off of this stage of the engine to heat and pressurize the airplane. It’s mixed with cold air from outside to regulate the temperature inside the cabin. Keep in mind, that this is fresh air, that hasn’t even been through combustion yet. It’s over 400 degrees, just from being compressed. After being compressed, it’s mixed with fuel and ignited. Unlike a car, it’s a continuous flame. You only need spark to light the engine when starting it. However, you can opt to turn on the continuous ignition that keeps the engine from flaming out in turbulence or icing conditions. Once the fuel is mixed with air and burned, it is forced over the turbine, which is connected to the fan in the front. It is then forced out the back of the engine. With an electric motor, there is no need to compress the air. That would just bog down the motor. It also wouldn’t be capable of flying at the altitudes a regular jet can fly at. Most jet engines are more efficient at higher altitudes.

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Blue LED Aircraft Type Carbon Fiber Car Automotive SPST Toggle Illuminated On / off Switch Button 12V $3.25 We have always been trying to provide the best service and reliable products for every customer.If you are not satisfy with something, please contact us via e-mail to resolve any issue before leaving a negative feedback or neutral feedback.We will definitely do everything we could to make you satisfaction! product description: this products are suitable for professional racing car use.now alre…

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Parkzone Ultra Micro P-51 BNF $99.99 Performance, control and innovation – a one-of-a-kind ultra micro experience…

Super Sonic RC Model Airplane R/C SYMA 9399 Training Plane ARF Radio Control Aircraft $24.68 - Full Function Radio Controlled - Super Tough - Lightweight Airframe - Length: 17″ - Wing Span: 20″ - All Molded Plastic and Foam Construction - Twin Propellers - Ingenious Thrust Vector Controls - Easy to assemble…

Air Earl RC Airplane Twin Engine Ready To Fly Corporate Jet $45.05 Air Earl Full function Radio Controlled Corporate Twin Engine Airplane. You can experience the feeling of flying after five minutes for assembly and 3 hours of charging. Full Function Radio Controlled 2-Channel super heterodyne equipment Forward, Up and down. Left and right Super Tough, Lightweight Airframe All Molded Plastic and Foam Construction Brake for Easy Landing Tube Fan with 2 powe…

Estes Viper RC Airplane with Motion Sensing Control $39.99 Estes RC Viper Stunt Plane uses the latest and greatest motion – sensing control technology! The revolutionary motion-sensing remote control puts you in the pilot’s seat like never before. Flying your Viper® is just like flying a “real” airplane: When you tilt the flight-stick-style remote to the left or right, the Plane responds to your movement, instantly and intuitively! There’s nothing like i…

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Learn To Fly Electric RC Aircraft Today $4.79 So you’ve always wanted to fly electric powered radio controlled (RC) aircraft, but don’t know how to get started? In a few moments here, you can begin exploring this hugely popular segment of the RC hobby and join the thousands of people who find remote control electric powered aircraft as a joyful family (or solo) fun activity.Devoted to electric powered model RC airplanes, this booklet pulls ou…

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E-Flite Pulse Xt 25e Arf

E-Flite Pulse Xt 25e Arf

E-Flite Pulse XT 25e ARF RC Airplane $174.99 Versatile, sport-performance aircraft that’s easy to fly off of land or water. The Pulse™ XT is an original Mike McConville design….

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(c) Radio Controlled Helicopters For Sale