Rotary wing aircraft

Details Rotary wing aircraft Rotary wing aircraft

1978-09-11

1980-06-17

Frankfort, Charles E.

Aeronautics and astronautics

Aircraft, heavier-than-air

Airplane and fluid sustained

244 23C, B64C 2900

Patent

active

042080258

ABSTRACT:
An aircraft rotary wing aerofoil assembly comprising a generally planar annular frame supporting radially inner and outer sets of aerofoil blades, each set being disposed to form an annulus and supported on the frame for rotation about a common axis, and first and second sets of panels are mounted on the frame for movement to shroud portions of the inner and outer sets of aerofoil blades respectively.

REFERENCES:
patent: 2863621 (1958-12-01), Davis
patent: 3599902 (1971-08-01), Thomley
patent: 3693913 (1972-09-01), Barland et al.
patent: 3813059 (1974-05-01), Jefferson

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