NASA NTRS · 19950070424
Variable-Tilt Helicopter Rotor Mast
Abstract
Variable-tilt helicopter rotor mast proposed to improve helicopter performance and reduce vibration, especially at upper end of forward-speed range of helicopters. Achieved by use of universal coupling in main rotor mast or by tilting entire engine-and-transmission platform. Performance, energy efficiency, and safety enhanced.
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Kelley, Henry L.. 1995-11-01. Variable-Tilt Helicopter Rotor Mast. https://ntrs.nasa.gov/citations/19950070424
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