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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.

Roll Center --

Basically, roll center is an imaginary axis that the model pivots (rolls) around when leaning side to side, such as while cornering. Roll center affects the steering response, weight transfer, chassis roll, and even camber gain of the model. Roll center is based on the geometry of the suspension, and is dependent on many factors, including: the length and position of the suspension arms, the length, position, and angle of the camber link (turnbuckle), the vertical position of the hub in relation to the suspension arms, and even tire diameter. Roll center is determined separately for the front and rear of the model. In general, a higher roll center decreases chassis roll - while a higher roll center on the front of the model increases on power steering response, but decreases off power steering response. Raising the roll center is commonly achieved by shortening the camber link or raising it's outboard mounting location. In general, a lower roll center increases chassis roll - while a lower roll center on the front of the model increases low speed steering response, but decreases high speed steering response. Lowering the roll center is commonly achieved by lengthening the camber link or lowering it's outboard mounting location. A lower roll center commonly magnifies camber gain, and the model will tend to transfer weight to the end with the lowest roll center. When adjusting roll center, always take into account the roll slope to avoid unbalancing the model. Note that this is an extremely brief overview, as roll center may be the most complex adjustment available on any ride.
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