Velocity calculations for all rodless cylinders need to differentiate between final velocity and average velocity. For example: Stroking a 100-inch BC2 model in one second yields an average velocity of 100 inches per second. To properly determine the initial forces for cushioning, it is important to know the final (or impact) velocity. Rodless cylinders accelerate and decelerate at each end of the stroke. Therefore this acceleration must be considered (see diagram at left).
If final (or impact) velocity cannot be calculated directly, a resonable guideline is to use 2 x average velocity.