SIKORSKY ELASTOMERIC ROTOR.

The historical development of elastomeric rotor technology at Sikorsky from 1960 to 1980 is presented. This technology has permitted the development of several different rotor concepts employed on the H-53, BLACK HAWK, SEAHAWK, and S-76 helicopters, which are discussed in detail. Design and analytic methodology used to support these programs are described. Testing and substantiation philosophy and methodology are also covered, and some mistakes to avoid are highlighted. Problems encountered during the design, development, and substantiation of these systems are outlined, as well as the solutions which were successfully employed. Elastomeric bearing manufacturing and quality control problems encountered are explained, and guidelines for avoiding these problems are established.