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7594796 |
Rotorcraft blade provided with a tiltable flap and a fastener tongue
The present invention relates to a rotorcraft rotor blade ( 1 ) that comprises at least one tiltable trailing-edge flap ( 5 ), said flap ( 5 ) being suitable for pivoting about a virtual hinge axis...
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7585151 |
Rotorcraft blade provided with a flap that is tiltable with the help of at least one main ball joint having a first shaft that is secured to said flap
The present invention relates to a rotorcraft rotor blade ( 1 ) having at least one trailing edge flap ( 5 ) that is tiltable, the flap ( 5 ) being suitable for pivoting about a virtual hinge axis...
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7461812 |
Rotorcraft control system with stepped mixing linkage
A control system for a rotorcraft is disclosed. The control system includes a stepped mixing linkage, such that a selected amount of right-left lateral cyclic output is generated for certain...
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7448854 |
Helicopter vibration control system and rotary force generator for canceling vibrations
Helicopter rotating hub mounted vibration control system for a rotary wing hub having periodic vibrations while rotating at an operational rotation frequency. The vibration control system includes...
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7264200 |
System and method for improved rotor tip performance
The present invention discloses systems and methods for the performance enhancement of rotary wing aircraft through reduced torque, noise and vibration. In one embodiment, a system includes a sail...
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7147182 |
Gas-powered tip-jet-driven tilt-rotor compound VTOL aircraft
A tilt-rotor compound VTOL aircraft has a multiple-flow thrust generator(s) comprising a gas-powered tip-jet driven rotor(s) having a thrust-augmentation ratio of at least two; that tilts about the...
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7093788 |
Rotating flying wing aircraft and control system
A rotating wing aircraft has a rotating fuselage and wings. The aircraft is configured to rotate with the air passing over the wings because of the rotation providing the lift needed to keep the...
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6984109 |
Rotor blade pitch control assembly
A rotor blade assembly provides a pitch control assembly to pitch the rotor blade about a rotor blade pitch axis. The pitch control assembly includes a trailing edge flap and a trailing edge servo...
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6942455 |
Strain isolated trim tab
A rotor blade assembly system includes a trim tab assembly which utilizes relatively thick resilient members bonded between a trim tab and the two trim tab doublers. Spanwise segmenting of the tab...
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6932569 |
Active control of multi-element rotor blade airfoils
A multi-element rotor blade includes an individually controllable main element and fixed aerodynamic surface in an aerodynamically efficient location relative to the main element. The main element...
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6682296 |
Turbine for flowing fluids
Turbine for flowing fluid, especially a turbine having a vertical power output shaft and formed with several wings projecting radially out from the power output shaft, which wings are rotatable...
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6652232 |
Self-trimming oscillating wing system
The present invention shows an oscillating wing system like lifting surface featuring a symmetrical profile mounted free to rotate over a fixation point located ahead neutral point and...
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6530542 |
Rotary wing aircraft with electric pitch control
Rotary wing aircraft with electric pitch control. According to the invention, each blade ( 5. i ) of the wing comprises a plurality of flaps ( 6. i ) which are able to control the pitch of said...
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6354536 |
Rotor hub mounted actuator for controlling a blade on a rotorcraft
A hub mounted actuation system for providing control of a portion of a rotor blade, such as a flap, on a rotorcraft. The rotor blade is attached to a rotor shaft that rotates with respect to an...
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6234422 |
Uniblade air rotor and flight and covercraft vehicles with its
The invention is related to air flight vehicles, such as vertical take-off and landing (VTOL) airplanes, helicopters and covercraft. The goal of this invention is to create an air rotor designed so...
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6200096 |
Actuation system for an active rotor control system
A flap actuation system for a helicopter rotor blade. The rotor blade includes a root end, a tip end, a trailing edge and a flap hinged to at least a portion of the trailing edge about a pivot...
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6196796 |
High torque actuation system for an active rotor control system
An actuation system for pivoting a flap on a helicopter rotor blade to reduce the interaction of the blade with the preceding blade vortex. The actuation system includes a fluid supply which is...
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6152692 |
Rotor blade with swivelling air flow control flap
The blade includes at least one trailing edge swivelling air flow control flap, swivelling on the blade around an axis directed substantially along the span of the blade and the control flap, the...
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6065935 |
Cycloidal propeller having blades which may be set into a sailing position
The invention provides for a cycloidal propeller, in strictly rudder operation, accessory apparatuses that mesh with a gear drive connected to a shaft of the respective wing. The invention...
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5791601 |
Apparatus and method for aerodynamic blowing control using smart materials
A method and apparatus for controlling the blowing of compressed air from an aerodynamic structure such as an aircraft wing or helicopter rotor blade and thus controlling the aerodynamic properties...
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5752672 |
Remotely controllable actuating device
An actuating device can change a position of an active member that remains in substantially the same position in the absence of a force of a predetermined magnitude on the active member. The...
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5730581 |
Rotor blade
A rotor blade made of fiber-reinforced synthetic resin has a profile which, at least in the region of the blade tip is designed so as to be twistable by actuators about the rotor blade longitudinal...
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5711651 |
Blade vortex interaction noise reduction techniques for a rotorcraft
An active control device for reducing blade-vortex interactions (BVI) noise generated by a rotorcraft, such as a helicopter, comprises a trailing edge flap located near the tip of each of the...
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5676524 |
Vertical-axis wind turbine
A turbine has an upright shaft defining and rotatable about a vertical main axis, a support plate fixed to the shaft, a plurality of upright vanes pivotal on the support plate about respective vane...
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5527151 |
Advanced wind turbine with lift-destroying aileron for shutdown
An advanced aileron configuration for wind turbine rotors featuring an aileron with a bottom surface that slopes upwardly at an angle toward the nose region of the aileron. The aileron rotates...
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5503525 |
Pitch-regulated vertical access wind turbine
A cross flow wind turbine comprising a rotor mounted for rotation about a vertical axis and a plurality of blade assemblies mounted on the rotor. Each blade assembly comprises a blade of aerofoil...
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5409183 |
Helicopter with leading edge servo flaps for pitch positioning its rotor blades
In a helicopter having a main rotor with blades controlled in pitch by servo flaps the servo flaps are arranged in advance of the leading edges of the blade to provide increased lift efficiency of...
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5320491 |
Wind turbine rotor aileron
A wind turbine has a rotor with at least one blade which has an aileron which is adjusted by an actuator. A hinge has two portions, one for mounting a stationary hinge arm to the blade, the other...
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5255871 |
Helicopter having rotors equipped with flaps
A helicopter comprises a pair of rotors each having a flap hinged to one of its edges, a seesaw rod swingably supported above the rotors, a pair of auxiliary wings fixed to opposite ends of the...
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5193978 |
Articulated blade with automatic pitch and camber control
An articulated blade whose forward vane section is directly pitched by relative fluid flow upon it, and whose rear deflector section deflects the flow upon it. A control arm, through parallelogram...
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5150864 |
Variable camber control of airfoil
An airfoil camber control apparatus utilizes a cable of shape memory alloy affixed at its ends to a front interior portion of the airfoil. A tensioning system is connected to a rear interior...
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4655685 |
Helicopter main rotor blade having a short span slot near the tip end
A helicopter main rotor blade having built-in twist for improved hover performance is provided with a trailing-edge, short span slot near the tip end of the blade for upwardly directing a stream of...
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4585392 |
Bladed rotor system and pitch controls therefor
A rotor system for a helicopter having a power shaft carrying at least one pair of diametrically opposite frames for rocking motion about an axis radially of said shaft. Sets of lift blades carried...
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4461611 |
Helicopter rotor with blade trailing edge tabs responsive to control system loading
A helicopter rotor having blade trailing edge tabs which are actuated in response to control rod loading to reduce or cancel the blade pitching moments imposed upon the blade and hence the control...
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4441858 |
Variable camber fluid power machine
This invention relates to a device converting the kinetic energy belonging to the moving stream of the fluid such as the wind, river and gulf streams to the power capable of doing a useful work in...
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4428712 |
Captive water current power system
Current energy is converted into shaft power in two stages; First, buoyant power units with stationary hydrofoil wings reach faster than the current speed by sweeping out a captive path. ...
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4383801 |
Wind turbine with adjustable air foils
A wind turbine has axially aligned, spaced, rotatable support flanges with a plurality of vertically aligned air foils having opposed ends journaled thereto. The air foils are pivoted respective to...
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4301981 |
Aircraft with rotary wing
An aircraft is provided with a wing in the form of an annulus having an airfoil shape in radial section, the wing being concentrically mounted on a vertical axle shaft which in turn is rotatably...
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4297076 |
Wind turbine
An improved wind turbine in which the tip portions of the blades are variable in pitch and are cyclically varied in pitch to control the yaw of the rotor and to relieve bending moments on the...
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4247251 |
Cycloidal fluid flow engine
A cycloidal fluid flow engine suitable for turbine and propeller operation, employing blades of aircraft type wing and tail configuration, pitch controllable through the full range of advance...
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4151424 |
Apparatus for utilization of energy from fluids
Improved apparatus for withdrawing useful energy from a fluent medium, the apparatus comprising supports with tension members spanning the distance between them, foils distributed along the tension...
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4137009 |
Pivoted blade barrel rotor wind turbine
The disclosed wind turbine has zero mean camber airfoil blades vertically pivoted at the outer ends of pairs of radius arms. The inner ends of the radius arms are fixed to a rotating mast. Each...
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4050246 |
Wind driven power system
A wind driven power plant has a vertical axis rotor which is rigidly connected to a center body in turn connected to a rotating base. The base is supported on a fixed pylon by means of a...
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3978345 |
System for utilizing energy in a fluid current
Foil elements capable of generating lift forces and converting such forces into rotational movement of a body are suspended and submerged in a flowing stream or fluid current. Control means are...
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3589831 |
CONTROL SYSTEM FOR ROTARY WING VEHICLE
A control system for a helicopter rotor has dual pitch changing mechanisms, one such mechanism for the inboard ends of the blades, and a second for servo flap control of an outboard station of each...
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3508841 |
STABILIZING DEVICE FOR ADJUSTING THE BLADE SETTING ANGLE OF ROTARY WING AIRCRAFT ROTOR
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3479821 |
LOAD SHARE CONTROL MECHANISM
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3448811 |
DEVICE FOR STABILIZING THE ROTOR BLADES OF A ROTARY WING AIRCRAFT
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3389879 |
Aircraft
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3332643 |
Control system for aircraft
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