Supersonic propellers for aircrafts

A supersonic propeller (FIGS. 4, 5, 6) providing horizontal subsonic or even supersonic speed and simultaneously a vertical lifting flight to its propelling air vehicle, constituted by an horizontal streamlined shell of thin profile of reduced drag, with upper convex semi-ellipsoid boundary (1) and a flat lower boundary (2) with a frontal opening (4) ±45° horizontally and vertically the lower ⅔ of its height and additionally two circular openings, the upper around the central axis on the convex boundary (2) and the lower close to the perimeter of the lower flat boundary (2), incorporating a rotating horizontal impeller of external surface similar to that of the shell of height equal to the frontal opening characterized on its external surface by vertical depressing blades of the height of the impeller tangential thin air layer and distanced by the same size and furthermore a radial flow blower with tilted centrifugal blades (5) in the internal surface on the said impeller (3) which blades are equipped in their two ends with non rotating deflectors (6) securing the vertical entry and exit of the lifting air flow, and with obstruction vanes (5) stopping the vertical air flow when is unnecessary.

An aircraft comprising a fuselage and at least one pair of supersonic propellers mounted on said fuselage, each of said supersonic propellers comprising:

• a thin-profile horizontally extending streamlined low-drag shell having an upper upwardly convex semiellipsoidal surface and a flat bottom surface, said shell being open forwardly over a window in the form of an arc extending about 90° around a vertical axis of the propeller and upwardly to about two-thirds of a height of the shell from said bottom surface;
• a horizontal impeller rotatable about said axis, wholly received in said shell and formed with a circular array of closely spaced vertical blades of a thickness of about 4 mm having heights equal at least to a height of said opening and exposed through said opening, said blades being spaced apart by substantially the same magnitude as said thickness and having external surfaces conforming generally to said upper surface;
• means for rotating said impeller about said axis to generate a horizontal pulling force upon said fuselage whereby said aircraft is propelled forwardly.