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It is essential for anyone buying an RC to know it's components. Knowing the parts that make up an RC car help you to make an informed decision on whether you'll be getting your money's worth or not, and is also important later on, in case you may decide to upgrade parts of your RC to improve it's performance. Here are the major parts of an RC car, and more importantly, the things to watch out for in each one.
Remote Controller - this is the transmitter that you hold in your hand. It allows you to control the actions of the RC, telling it to stop, go, and which way to turn. When buying a remote control, make sure that it's comfortable. Don't pick one with tons of features but which will sit clunkily in you grip. Also, look for a controller that allows for variable speed and wheel angle steering adjustment. Without the ability to adjust the extent of speed or steering, your car's only options will be turning full left/right, and go full speed/stop now!
Receiver and Gearboxes - the receiver gets the signals from the transmitter and conducts them to the gearboxes, which allow the motor and the wheels to operate. Find ones with high degrees of sensitivity. A receiver that picks up signals easily is determined on the specs sheet by the maximum operating range of the car. The farther the operating range, the better. The gearboxes on the other hand have to be capable of making minute adjustments to steering. Test the RC before buying it to make sure that the wheels get angled properly by the gearboxes when you attempt to steer.
Motor - the heart of the RC. No matter the type, whether electric or nitro driven, look at the power output of the motor and compare it to the energy or fuel usage of the motor. Go for fuel or battery efficiency as a first pick, while you're still learning the ropes, and modify it for power as you gain more experience in RC operation.
Undercarriage - like a real sized car, the engine, receiver, and gearboxes are all mounted on a frame. Find a sturdy one, as the undercarriage protects the valuable and sensitive components of the RC car. Composite plastics have to be high impact, preferable, to make sure that your RC can survive punishing crashes. Replacing a cracked undercarriage is easy, but replacing the internal parts can be much more expensive.
Wheels and Shocks - yes, these are, just like a real car, very important. Most of the considerations that apply to picking these for a real car apply. Get tires with good road grip, and shocks that have a medium level of bounce - too soft, and your internal components get rattled from bouncing too much. Too hard, and your RC will tend to jump far too high over even small road bumps, incidentally jarring your RC and causing wear and tear to the parts of the chassis supporting the shocks.
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