Hovering aircraft

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes

Patent

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Details

244 11, 244 123, 244 26, 244 28, B64B 120, B64B 134, B64C 2722

Patent

active

059314117

ABSTRACT:
In a novel hovering aircraft, an airfoil blade structure rotatable about a vertical axis comprises a set of upper blades and a set of lower blades, all having variable lift, the upper blades converging toward the lower blades from root to tip. Struts, located inboard of the blade tips, keep the tips of the upper and lower blades separate from each other to reduce interference effects, and also support motors and propellers.

REFERENCES:
patent: 1419962 (1922-06-01), Denham
patent: 2389798 (1945-11-01), Main
patent: 2717131 (1955-09-01), Barrett
patent: 3976265 (1976-08-01), Doolittle
patent: 4482110 (1984-11-01), Crimmins, Jr.
patent: 5082205 (1992-01-01), Caufman

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