| 摘要 |
<p>One or more helicopter blades are supported from a helicopter rotor in articulated fashion by a spherical elastomeric bearing which permits blade motion about the blade lead-lag axis and which includes a piston-cylinder type lead-lag damper. Lead and lag stops positioned selected distances from the blade shaft so that during rotor start-up operation, the uncentered blade will increase in lead angle to eventually be supported by the lag stop and the bottomed-out damper piston and so that, during rotor braking operation, the uncentered blade will increase in lead angle and eventually be supported by the lead stop and the bottomed-out lead-lag damper. This construction does not include a centering bearing.</p> |
