Consideration of off-on-modulatcd reversing clutch servo systems

Cost and reliability are present critical factors in aircraft development. It is suggested, therefore, that a study of simpler, more rugged servo controls is in order. In this regard, the improvement of older-type, nonlinear electromagnetic controls which do not depend upon vacuum-tube equipment should be considered. Off-on-modulated servo clutch controls of this type have substantial advantages in weight, simplicity, and acceleration characteristics. They may be made to approximate closely the performance of a proportional type of control by the use of velocity feedback. Power gains of up to 50 times in the magnetic servo clutch allow direct operation from the signal sensing unit.