Title: Compound helicopter drive means

Abstract: Compound helicopters, those having a rotor blade and a small wing, possess rear propulsion propeller adjacent to the tail rotor. The tail gearbox is driven through a drive train coupled to the main rotor drive shaft. In such aircraft the tail rotor is in operation when the propulsion propeller is turning, and vice versa. A mechanism is provided herein for stopping or feathering the tail rotor when driving the propulsion propeller, or for stopping the propulsion propeller when the tail rotor is in operation.

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Inventors: Hudgins, Wayne A. (Hampton, VA, US)

Application Number: 632340
Filing Date: 1975-11-17
Publication_date: 1976-08-31
Assignee: The United States of America as represented by the Secretary of the Army (Alexandria, VA)
Primary Class(es): 416/123 244/17.19, 416/169R, 416/170R
Other Classes:
US Patent Ref:

1154769	Sep, 1915	Hertzberg	74/764.
2401365	Jun, 1946	Mercier	416/170.
2771143	Nov, 1956	Campbell	416/123.
2838913	Jun, 1958	Peterson et al.	416/170.
2890604	Jun, 1959	Campbell	74/764.
3190414	Jun, 1965	Maurer et al.	74/785.
3468192	Sep, 1969	Nasvytis	74/764.
3540680	Nov, 1970	Peterson	244/17.
3679033	Jul, 1972	Wagner	244/17.
3851546	Dec, 1974	Kepple et al.	74/785.

Other Refs:
Primary Examiner: Blix, Trygve M.
Assistant Examiner: Barefoot, Galen L.
Attorney: Wilson, Jr.; Norman L.