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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.

Caster - Caster Angle ?--

This affects straight line stability, chassis lean, and the tire's contact patch while cornering. Caster is the angle of the suspension arms or kingpins in relation to the chassis, and is most commonly adjusted on the front suspension. For RC, positive (+) caster is always used, meaning the arms or kingpins are leaned back, thus the tires are 'trailing' behind the centerline of the suspension. This enables the wheels to 'self center', much like the front wheels on a shopping cart. Less caster results in more steering while entering a corner, but less steering on exit. More caster results in less steering while entering a corner, but more steering on exit. On pillow ball (A arm or double wishbone) models, caster is usually adjusted using hingepin spacers to move the arms forward (more caster) or back (less caster). With C hub models, the C hubs are swapped to alter caster. Raising the leading edge of an arm or tilting the kingpin back increases caster. Altering caster also affects the camber setting since it rotates the hub - increasing caster decreases the camber of that wheel (and visa versa). Note that less caster helps the inside tires stay planted while cornering, while more caster increases straight line stability.
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