Ken Cashion

THE BASIC DESIGN of Radio Control components has remained constant for a number of years. The operating specifications may occasionally be improved and the sizes of the individual components may vary, but the operation has remained unchanged. All actual movement of control surfaces, spoilers, flaps, landing gear, etc., still begins with the rotation of a servo output shaft, which is generally limited to ±45º. While the mechanical reactions to this rotation have become cleverly adapted to produce a multitude of push-pull, pull-pull, pivoting levers, sliding servos, and similar functions, the airframe response to the movement of a transmitter stick or switch is still the limited ± rotation of a shaft. (The linear servo is rarely seen today.)