Design Studies and Model Tests of the Stowed Tilt Rotor Concept. Volume I. Parametric Design Studies.

摘要

The stowed-tilt-rotor stoppable rotor concept offers great potential for three missions requiring 2combinations of relatively low downwash characteristics,good hover efficiency,and relatively high cruise speed and efficiency. These missions are high-speed long-range rescue,capsule recovery,and VTOL medium transport. The present study will provide information on design criteria including the size and configuration of aircraft required to fulfill each of the three missions. The current study indicates that there is reasonable compatibility between the rescue and capsule recovery aircraft because their speed capabilities and required useful loads are similar. However, a much larger aircraft is required to accommodate all three missions. (A reduction in cargo box size for the transport mission can however provide a single compromise airframe size.) Consequently, a baseline configuration has been selected with a common lift/propulsion system combined with different fuselages for rescue aircraft and medium transport aircraft. The compromise made in the transport fuselage box size still provides a capacity in excess of most current medium transports,both helicopter and fixed-wing. (Author)