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US 7,370,828 B2Granted
Rotary wing aircraft
AssigneeX Blade Systems LP
InventorThomas G. Stephens
Life of this patent
Estimating the term…
Abstract
A rotary wing aircraft is provided with longitudinally oriented counter-rotating rotors with circumferentially spaced variable pitch elongated rotor blades connected at their opposite ends to rotatable support rings mounted on the aircraft fuselage. Rotor downwash may be guided laterally and longitudinally by respective sets of moveable guide vanes. Propulsion may be obtained by an engine providing thrust and power take-off for driving the rotors. An auxiliary or second engine may be drivingly connected to the rotors.
Claims18
A rotary wing aircraft comprising:
- a fuselage including an elongated body part including a longitudinally extending opening or openings formed in an upper portion of said body part, a lower body part including an exit duct;
- spaced apart coaxial counter-rotating rotors mounted on said fuselage for rotation in opposite directions, said rotors including plural, circumferentially spaced apart, longitudinally extending rotor blades supported for change in pitch or angle of attack during rotation thereof to provide lifting effect for said aircraft, the rotor blades rotating about a longitudinal centerline of the fuselage;
- and
- engine means driveably connected to said rotors.
1 more element
Dependencies are inferred from the claim text.