Title: Droop stops for helicopter rotor having elastomeric bearings

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.

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Inventors: Rybicki, Robert C. (Trumbull, CT, US)

Application Number: 540309
Filing Date: 1975-01-10
Publication_date: 1976-01-13
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 416/140 416/141
Other Classes:
US Patent Ref:

3501250	Mar, 1970	Mosinskis	416/140.
3533713	Oct, 1970	Salmun	416/140.
3679322	Jul, 1972	Mouille	416/141.
3778189	Dec, 1973	Ferris	416/140.
3853426	Dec, 1974	Rybicki	416/140.

Other Refs:
Primary Examiner: Powell, Jr., Everette A.
Assistant Examiner:
Attorney: Hauschild; Vernon F., Kline; Robert E.