Heavy-Lift Helicopter Engine Control System

The Heavy-Lift Helicopter is planned as a component of a U.S. Army logistics system with the primary mission of picking up and delivering a 22. 5-ton external payload. This paper describes the control aspects of the XT701-AD-700 engines which are designed and manufactured by Detroit Diesel Allison for the Heavy-Lift Helicopter. Control system requirements as related to the air vehicle interface are discussed with emphasis on the engine control fly-by-wire concept, mission objectives, and system response. A description of the major engine control components is given and particular airframe integration efforts are discussed. A brief review of the dynamic analysis and representative results are presented.