A 400-cycle aircraft motor

The ever-present need for lighter-weight and more compact aircraft electric motors is evident as any reduction in weight or space provides increased fuel, bomb, or pay-load capacity. Reliable 400-cycle motors more compact and approximately 40-per-cent lighter than existing 24-volt d-c motors have been developed recently. Present trends indicate that these motors will be used extensively aboard the airplane of tomorrow. This paper describes some of the 400-cycle motors that have been developed and discusses their requirements with the view of disseminating information so that others may better understand the motors and the performance to be expected from them.