Droop stops for helicopter rotor having elastomeric bearings

Details Droop stops for helicopter rotor having elastomeric bearings Droop stops for helicopter rotor having elastomeric bearings

1975-01-10

1976-01-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Including movement limit stop or damping means

416141, B64C 2738

Patent

active

039320596

ABSTRACT:
A fully articulated helicopter rotor having an elastomeric type main bearing which is reactive of all blade motions about the intersecting blade pitch change, lead-lag, and coning axes, including blade droop supporting and limiting members for static and dynamic operating conditions wherein coupling influences between the separate blade motions are precluded. In reacting these blade weight loadings and dynamic thrust forces, the droop members specifically provide full area contact bearing surfaces to distribute the large forces from the blades into the rotor hub proper while avoiding scuffing or rolling contact between the parts, and the high bearing stresses which would result from either point or line contact only.

REFERENCES:
patent: 3501250 (1970-03-01), Mosinskis
patent: 3533713 (1970-10-01), Salmun
patent: 3679322 (1972-07-01), Mouille
patent: 3778189 (1973-12-01), Ferris
patent: 3853426 (1974-12-01), Rybicki

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