Flexbeam helicopter rotor with improved snubber-vibration damper between the torque tube and the flexible spar member

摘要

The flexbeam helicopter rotor has an improved snubber-vibration damper (52, 53) for positioning the flexbeam spar (22) relative to the torque tube (28), wherein the snubber-damper (52, 53) is an elastomeric bearing having a spherical and a flat portion (64, 70), and whose laminates (80, 82, 76, 78) are continuous, selectively preloaded and of selected material to provide increased fatigue life, size reduction, reduced laminate stress concentration, and reduced critical design stress in the snubber-vibration damper.