Dynamic Model Wind Tunnel Tests of a Variable-Diameter,Telescoping-Blade Rotor System (TRAC Rotor).

摘要

An analytical and experimental program was conducted to establish feasibility and determine characteristics of the Sikorsky TRAC rotor system,which is a unique variable-diameter,telescoping-blade concept for advanced rotary-wing aircraft. The program included a preliminary design study of a full-scale blade,wind tunnel tests of a dynamically scaled rotor model in various flight modes,and correlation of experimental results with theory. Feasibility was established for the TRAC rotor operating both as a high-speed compound helicopter and as a stopped/stowed rotor configuration. The basic blade structural design and the retraction system were verified with the model,which was scaled for operation at full tip speeds and forward speeds. (Modified author abstract)