Advanced Overrunning Clutch Technology.
Rept. for 14 Mar 74-14 Jun 76,
UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV
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This report documents a study to find overruning clutch concepts suitable for use in helicopters. Ten designs were selected for in-depth evaluation, and from these, three were selected for fabrication and testing the spring, the sprag, and the ramp-roller clutches. These performed satisfactorily in the tests, and a design guide was compiled for them USAAMRDL-TR-77-18. Author