Helicopter with coaxial counter-rotating dual rotors and no tail

Details Helicopter with coaxial counter-rotating dual rotors and no tail Helicopter with coaxial counter-rotating dual rotors and no tail

1995-01-18

1998-08-11

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244 1719, 244 87, 416170R, 416129, B64C 2710

Patent

active

057915920

ABSTRACT:
A helicopter having two engines driving a single rotating drive shaft on which are mounted two spaced counter-rotating coaxial rotors at the same speed and having a tail boom free of a tail rotor and supporting two horizontally spaced pairs of air foils for controlling the direction of yaw in flight.

REFERENCES:
patent: 1378112 (1921-05-01), Hewitt
patent: 1568765 (1926-01-01), Ortego
patent: 1849235 (1932-03-01), Kibbe
patent: 1887429 (1932-11-01), Price
patent: 2074342 (1937-03-01), Platt
patent: 2388653 (1945-11-01), Hays
patent: 2395610 (1946-02-01), Cavallaro
patent: 2480806 (1949-08-01), Desmoulins
patent: 2496857 (1950-02-01), Cronstedt
patent: 3096953 (1963-07-01), Koump

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