A differential reluctance measuring system and its application to model and ship testing

A measuring system is described which has been developed at the David Taylor Model Basin for use in model and full-scale ship testing. The system utilizes transducers of the differential air-gap type, special designs of which permit measurement of torque or thrust in rotating shafts without the use of slip rings. The system includes instrumentation for direct recording and for visual or automatic digital readout. Accuracies of ±½% or better are obtainable.