Helicopter of the type having two coaxial counterrotating rotors

Details Helicopter of the type having two coaxial counterrotating rotors Helicopter of the type having two coaxial counterrotating rotors

1978-10-13

1980-08-12

Kelmachter, Barry L.

Aeronautics and astronautics

Aircraft power plants

Transmission of power

74665K, 416129, B64D 3506

Patent

active

042169259

ABSTRACT:
The invention provides a helicopter of the type having two coaxial counterrotating rotors with a differential drive mechanism interposed between the power plant and the rotors. The power output of the power plant is coupled to the power input of the differential drive which has two power outputs, one of which is directly connected to the mounting hub of one of the rotors and the other one is connected to the mounting hub of the other rotor through a rotation inverting mechanism. Two embodiments are described and illustrated which differ only by the construction of the differential and the rotation inverting mechanisms.

REFERENCES:
patent: 2085483 (1937-06-01), Trebucien
patent: 3450208 (1969-06-01), Barton
patent: 3669564 (1972-06-01), Garfinkle

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