Ellis G Murph

US Patent:

59969342, Dec 7, 1999

Filed:

Nov 24, 1997

Appl. No.:

8/976745

Inventors:

Ellis G. Murph - Shallotte NC

International Classification:

B64C 2752
B64C 2700

US Classification:

244 1725

Abstract:

A tethered autogyro including means for tilting the autogyro rotor to compensate for differences in relative air pressure on rotor blades while minimizing frictional pressures restricting rotor rotation. The autogyro includes a fuselage; a rotor mast having a lower end attached to the fuselage and a rearwardly tilted upper section; upper and lower retainers separated by a given distance on the mast upper section; and a tiltable rotor mounted on the mast between the retainers, the rotor including a hub having a vertical dimension greater than the given distance, and rotor blades attached to the hub. The hub includes a mast receiving bore that increases in diameter from an upper circular edge having a diameter approximately equal to the diameter of the mast to a lower opening that has a diameter in at least one direction larger than the diameter of the mast.