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7762776 |
Vortex shedding cyclical propeller
A propeller having one or more blades eccentrically mounted to a shaft dynamically changes the blade pitch to produce free vortices in a fluid. For extracting energy from a moving fluid, the fluid...
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6932296 |
Cycloidal VTOL UAV
A system and method for moving an aerial vehicle along a flight path includes rotatable hubs mounted on opposite sides of the vehicle. Elongated airfoils are mounted on the hubs parallel to a...
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6227483 |
Wing movement for ornithopters and apparatus of the like
The wing movement has a gearbox, a reference gear extending through the gearbox and being movably mounted to the gearbox, an input shaft extending through the reference gear and into the gearbox...
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5265827 |
Paddle wheel rotorcraft
An aircraft having vertical takeoff and landing capability having at least first and second laterally extending paddle wheels rotatable on a central axis generally perpendicular to the longitudinal...
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4527757 |
Lift generating mechanism for an aircraft
A lift generating mechanism includes a plurality of airfoils each having first and second end surfaces, first and second side surfaces, and a centerline extending between the first and second side...
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4210299 |
Propulsive lifting rotors
A propulsive lifting rotor for an aircraft comprises two wings pivotally mounted about axes parallel to their leading edges. The wings (rotary airfoils) are located at respective sides of a plane...
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4166595 |
Variable lift advancing wing aircraft
An aircraft comprised of a pair of spaced apart interconnected air-frame members and a cargo compartment supported therewithin is provided with a plurality of expansible airfoils mounted for...
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4113205 |
Aerodynamic lifting mechanisms
An aerodynamic lift mechanism comprises a plurality of aerofoils mounted on two continuous toothed belts which are driven by toothed pulleys. A lever connects each aerofoil to a continuous member...
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3938759 |
Special aircraft using a novel integrated lift, propulsion and steering system
An aircraft having a body on which is mounted an integrated lift, propulsion and steeing system inclusive of cycloidal propellers having horizontal axes of rotation capable of developing net thrust...
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3321022 |
Rotary wing assembly
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3291236 |
Ground effect machine
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3161376 |
Ornithopter type aircraft
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2990139 |
Airship with feathering paddle wheels
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2966317 |
Paddle wheel sustained aircraft
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