Introduction
The remote control helicopter is not only a new rising industry ,it is also a quickly increasing one.And the related technology and design is keeping upgraded.It is attracting more and more people,it is no exaggeration to say that it has become a fad and almost everyone wants to have an access to it.From all aspects, it is a profitable project.
Below I will talk about how to classify them by its engine and size.
Classify by Engine
There are four types of power used in them : battery, nitro, gas, and turbine.
Battery Power: Vast majority of them are powered by rechargeable battery. Recent advances in lithium polymer batteries allow an impressive amount of power to be stored in a lightweight package, and their makers made use of them to deliver many minutes of flight time in such a tiny package. More sophisticated battery powered helis (mini or midsize) can use replaceable battery packs (keep a couple charged ones around!)
Nitro Engine: For longer flight duration, a nitro engine is needed. Sometimes known as a "glow engine", this type of engine is closer to diesel in that it does not use spark plug, but use a mixture of methanol, nitro-methane, and oil, thus the name. Fuel is expensive though. These engines runs at extremely high RPM, up to 17000 and makes a very piercing screech when powered up. Some people call these "gas engines", which is not correct.
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| fantastic rc heli |
Gas Engine: Some larger ones use a tiny 2-cycle gasoline engine. These don't generate as much noise as the nitro engines, and gasoline is available almost anywhere, and you just need some 2-cycle engine oil to go with it. On the other hand, they are pretty big for them , and generally only appear on full and large sized ones (see below on size classifications).
Turbine Engine: For the ultimate in realism, you can't beat a miniature turbine engine, but these are extremely expensive, though the power they can generate with such a small engine is truly amazing (that's why they are used in real helicopters!) Parts are hard to come by.
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| beauty rc heli |
Classify by Size
The size of them(its "scale") vary greatly, from little 8-inch micro heli (eSky Blade mCX 300) to huge 60 inches (5 ft!) Bergen Intrepid. They are generally grouped into 5 classes
Micro -- your typical "toy" found in Brookstone, Radio Shack, and such, about 6-12 inch total, fits in palm of your hand, battery powered. Majority of the RC helis will be in this size category. Cost ranges from $15 - 125 depending on sophistication, flight time of about 3-8 minutes on a full charge. Electric-wise this is like 100 to 150 class.
Mini -- 12-24 inches in length, this is appearing at a discount in some hobby and toy stores. Most are battery powered, though more sophisticated version may use the smallest nitro engine available. Cost is between $30-300. This would be 200-350 class.
Midsize -- 24-48 inches in length, this is what the sophisticated flyers use to achieve those incredible aerobatic maneuvers such as upside down, barrel roll, and so on. Usually 6 channel control, and very often nitro fueled instead of battery fueled. Going by electric size this is 400-550 class. Nitro is probably class 30-60.
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| bright rc heli |
Full Size -- 48 to 60 inches in length, these are not adversely affected by wind and can easily fly outdoors. In fact, they are so large you should NOT even try to fly them indoors (the exhaust fumes from the engines can be a problem). Their mass make them quite stable. This is the 600-700 class (of class 90 if you go by nitro engine size)
Large Size -- longer than 60 inches in length, size of a small child, these can easily reach ACTUAL speed of over 100 MPH (not scale speed!) and can easily be considered "drones". This can be powered by gas, nitro, or even miniature turbines. These are for very serious hobby flyers and usually requires some serious assembly.
Now I believe that you have already had a general impression of the catergaries of the fantastic toys .Trust me ,if you are a faithful rc lover,you had better know more about it,because there is still so much fun and attrative things that you still don’t know about it.Then come and visit us!
Toy-grade R/C cars are typically manufactured with a focus on design coupled with reducing production costs. Whereas a hobby-grade car has separate electronic components that are individually replaceable if they fail, toy grade cars are typically made with components harder to find as spare parts and a single electronic circuit board integrated into the design of the vehicle. Although hobby-grade enthusiasts look down on toy-grade RC cars, their maintenance is much easier than of the hobby-grade models since number of components is drastically smaller, and parts can be harvested at almost no cost from any R/C toy car of the similar size. Performance is proportional to the price, but with addition of hobby-grade type of batteries (LiPo) toy R/C cars can get up to 1/2 the speed of comparable hobby-grade car for 1/5 of the price. Stock toy-grade cars are equipped with weaker motors and are powered by alkaline or NiCad batteries which means their top speed is usually only 5-15 mph. Cheaper ones lack any form of a suspension and the ones that do feature a suspension have very primitive or rudimentary designs. Steering is typically not proportional (with only three positions: straight, full left, and full right) and there is typically no proportional "throttle" either, with stopped and full power usually being the only options. With all the disadvantages, toy-grade R/C cars are a great intro to the hobby, especially for ages 5 – 10, and are cheap platform for modifications and tuning even for older enthusiasts.
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| Rc car |
Radio-controlled cars use a common set of components for their control and operation. All cars require a transmitter, which has the joysticks for control, or in pistol grip form, a trigger for throttle and a wheel for turning, and a receiver which sits inside the car. The receiver changes the radio signal broadcast from the transmitter into suitable electrical control signals for the other components of the control system. Most radio systems utilize amplitude modulation for the radio signal and encode the control positions with pulse width modulation. Upgraded radio systems are available that use the more robust frequency modulation and pulse code modulation. Recently however, 2.4 GHz frequency radios have become the standard for hobby-grade R/C cars.
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| Yellow RC car |
The radio is wired up to either electronic speed controls or servomechanisms (shortened to "servo" in common usage) which perform actions such as throttle control, braking, steering, and on some cars, engaging either forward or reverse gears. Electronic speed controls and servos are commanded by the receiver through pulse width modulation; pulse duration sets either the amount of current that an electronic speed control allows to flow into the electric motor or sets the angle of the servo. On these models the servo is attached to at least the steering mechanism; rotation of the servo is mechanically changed into a force which steers the wheels on the model, generally through adjustable turnbuckle linkages. Servo savers are integrated into all steering linkages and some nitro throttle linkages. A servo saver is a flexible link between the servo and its linkage that protects the servo's internal gears from damage during impacts or stress.
After reading what I have written above,I think you should have a try,trust me ,it is amazing!
