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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Needle Valve --

"An adjustment on a nitro engine's carburetor that allows fuel into the engine. Basically, a needle valve is a threaded needle inside a cylinder that allows an amount of fuel to pass by according to how much of the tip is exposed to the entry point. Turning the needle valve clockwise leans an engine (lets less fuel in), while turning the needle valve counter-clockwise richens the engine (lets more fuel in). You will usually find 2 needle valves on an engine: a high speed needle valve (the one that is most prominent) and a low speed (found on the carb body). Some engines may even include a mid-range needle valve. Note that finer threads on a needle valve = more accurate tuning and better """"hold"""". BTW, the idle screw is not a needle valve, it just regulates how far the carb barrel will open."
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