Constant-speed drives for aircraft alternators

IN LARGE MILITARY AIRCRAFT the demand upon the electric system has been increasing exponentially. At the start of the war, 50-ampere generators were considered ample; this rating soon jumped to 100, and now 200-ampere generators on our four-engine bombers are inadequate. As the limits of power output are reached, the necessity for satisfactory parallel operation and equality of division of the load becomes extremely important.