CONSIDERATIONS OF LIFT ENGINE INSTALLATIONS IN VTOL AIRCRAFT FROM THE VIEWPOINT OF THE AIRFRAME DESIGNER

This paper outlines and discusses several of the important problems which must he solved by the airframe propulsion designer to obtain a high thrust-to-weight ratio lift engine installation. Problems considered include starting, air induction, exhaust, fire protection, and VTO control. The thrust-to-weight ratio degradation from bare engine to final installation is shwon for a typical example. Some installation requirements, which must also be considered by the engine designer, are noted.