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An aircraft, either rigid-wing or a collapsible hang-glider, is provided which is a bi-plane of apparent annular-wing construction in plan view, but the wing tips of an anhedral foreplane are separated from and above the wing tips of a dihedral aftplane. In a hang-glider construction the wing tips o

An aircraft, either rigid-wing or a collapsible hang-glider, is provided which is a bi-plane of apparent annular-wing construction in plan view, but the wing tips of an anhedral foreplane are separated from and above the wing tips of a dihedral aftplane. In a hang-glider construction the wing tips of the foreplane may be supported above the wing tips of the aftplane by struts, the trailing edges of the foreplane wing tips being supported by the struts above the leading edges of the aftplane wings. Also in the hang-glider, the geometry of the fore and aftplanes can be varied by moving their points of connection to the keel therealong.

대표청구항 ▼

A compound wing powered aircraft comprising a fuselage, a downwardly-directed ventral fin in the region of the rear end of the fuselage, a swept-back anhedral foreplane and a forward-swept dihedral aftplane of at least approximately equal area to the foreplane, each of said foreplane and aftplane co

A compound wing powered aircraft comprising a fuselage, a downwardly-directed ventral fin in the region of the rear end of the fuselage, a swept-back anhedral foreplane and a forward-swept dihedral aftplane of at least approximately equal area to the foreplane, each of said foreplane and aftplane comprising wings with leading and trailing edges and tips at their outer extremities, the foreplane wings extending from opposite sides of the fuselage, the aftplane wings extending from opposite sides of the ventral fin at a position spaced from the fuselage, the wing tips of the foreplane being above, unconnected with and separated from the wing tips of the aftplane and the wing tips of the aftplane terminating to the rear of the trailing edges of the foreplane wings.