CONSTANT SPEED DRIVES FOR HIGH MACE AIRCRAFT

The increased requirement for a-c electrical power with closely regulated frequency in high Mach aircraft dictates the need for high performance constant speed drives. Hydraulic variable speed transmissions are particularly adapted to provide the fast response and close speed control required in these devices. The purpose of this paper is to describe the characteristics of the components utilized in constant speed drives and some of the technical problems and their solutions in assembling these components into complete speed drive systems. Examples of actual hardware and test results are given.