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Match Document Document Title
7578654 Rotorcraft blade provided with a tiltable flap  
A rotorcraft rotor blade ( 1 ) includes at least one tiltable trailing-edge flap ( 5 ), the flap ( 5 ) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially along...
7509737 Fan blade manufacturing methods  
A method of manufacturing a fan blade includes providing a fan blade blank including opposed major faces, opposed inner and outer extremities, and opposed first and second sides defining opposed...
7467921 Vortex control for rotor blade devices  
To control vortices originating at the tips of a rotor's blades rotating through the air at a revolution frequency f, separation control device(s) are actuated to periodically introduce...
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...
7458777 Wind turbine rotor assembly and blade having acoustic flap  
A wind turbine includes a rotor assembly having at least one blade with a blade body defining a leading edge and a trailing edge and adapted for movement in response to a wind flow over the body to...
7419356 Method for regulating a windmill, and an apparatus for the use of said method  
The invention relates to a method and a device for regulating the airflow around a blade of a windmill. The device comprise a spoiler, which is provided with a cavity. The spoiler is mounted to a...
7293959 Wind turbine blade with lift-regulating means  
Wind turbine blade ( 10 ) including adjustable lift-regulating means ( 12, 13, 15, 17, 19, 21 ) arranged on or at the surface of the wind turbine blade ( 10 ), said lift-regulating means being...
7204674 Rotor blade for a wind power installation  
A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly...
7101237 Propellor blade adjustment system for propulsion through fluid environments under changing conditions  
The stern end of a seawater hull has a rotor hub with propeller blades thereon. The rotor hub is rotated for propulsion of the hull by means of a propeller shaft extending through a sealed...
7045702 Solar-paneled windmill  
A solar-paneled windmill is provided having aerodynamic fan blades provided with solar panels. The windmill produces electricity using wind energy and solar energy. In another embodiment, magnets...
6984110 Windmill blade and apparatus for generating power using the blade  
Disclosed is a wind power generating apparatus in which windmill blades are mounted in a multi-stage fashion to a rotating shaft while being spaced apart from one another to efficiently generate...
6966758 Wind turbine rotor blade comprising one or more means secured to the blade for changing the profile thereof depending on the atmospheric temperature  
A wind turbine rotor blade ( 10 ) comprising one or more means ( 4 ) secured to the blade ( 10 ) for changing the profile thereof depending on the atmospheric temperature. The means comprises at...
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...
6902370 Telescoping wind turbine blade  
A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free...
6816823 Process for designing flight controllers  
Process for designing flight controllers, in which first for the rigid airplane and then for the elastic airplane the damping and the phase delay for each excitation frequency is determined, and...
6776580 Variable edge rotor blade  
A variable edge rotor blade adapted to be driven by the rotor hub includes an airfoil section; a movable edge section coupled to the airfoil section, and an actuator device operating independently...
6666648 Directional elastomeric coupler  
An elastomeric coupler assembly having a helical elastomeric bearing movably supports an active slat relative to a main element. An inner elastomeric coupler assembly and an outer elastomeric...
6663345 Rotor blade with control flaps  
Rotor blade for a helicopter having an aerodynamic control flap, particularly a camber flap, is integrated essentially in the contour of the blade profile. The camber flap is swivellably arranged...
6648599 Method and control arrangement for adjusting a flap that is pivotally supported in a rotor blade of a helicopter  
A force transmitting linkage connects a piezoelectric actuator to a flap that is pivotably connected to a helicopter rotor blade. In a flap actuation control arrangement and method, a force...
6644919 Rotor blade with flap and flap drive  
A rotor blade arrangement includes a rotor blade with a hollow blade chamber therein, and a flap module removably arranged and secured in the blade chamber. The flap module includes a module...
6544000 Magnetostrictive adjustment of propeller blade  
A magnetostrictive rod subject to a magnetic field generated by an electrical activating coil within a pocket of a propeller blade is held in abutment with the body of the blade to effect its...
6481964 Rotor blade having a control flap  
A rotor blade for a helicopter has a blade root for a fastening in the area of the rotor mast and a radially exterior blade tip. An aerodynamic control flap is integrated essentially in the contour...
6478541 Tapered/segmented flaps for rotor blade-vortex interaction (BVI) noise and vibration reduction  
An active control device for reducing blade-vortex interactions (BVI) noise generated by a rotorcraft, such as a helicopter, comprises a segmented trailing edge flap located near the tip of each of...
6474945 Flap hinge mechanism, method for manufacturing the same, and flap hinge apparatus  
A flap hinge mechanism has a blade-secured portion secured to blade, a flap-secured portion secured to flap, and a coupling portion which couples the blade-secured portion and the flap-secured...
6474184 Tilt and swivel positioning device  
A tilt and swivel positioning device for positioning a servo flap in a rotor blade. The device contains a tilt element and a bearing element. The tilt element is swivellably attached to the bearing...
6461106 Method for reducing blade-vortex interaction noise generated by a rotary wing  
The present invention relates to a method for reducing the blade-vortex interaction noise of rotary wings. According to the invention: at least one value Ψo of the azimuth of the blades ( 1 ) is...
6454207 Flap support mechanism and a flap-equipped rotor blade  
A flap support mechanism for attachment of a flap to a rotor blade so as to permit angular displacement with respect thereto has a tension-torsion member disposed coaxial with a hinge axis of the...
6322324 Helicopter in-flight rotor tracking system, method, and smart actuator therefor  
A system for quasi-statically correcting tracking of rotor blades of a helicopter rotor during operation includes a trim tab mounted on each rotor blade and deflectable relative to the rotor blade...
6273681 Rotor blade flap driving apparatus  
An actuator and first to fourth links constitute a first displacement magnifying mechanism. An input shaft which is fixed in a basal end of the first and second links, a support shaft which is...
6231013 Airfoil member with a piezoelectrically actuated servo-flap  
An airfoil member, especially a rotor blade for a helicopter, includes an airfoil body and a servo-actuated flap tiltably connected to the airfoil body so as to form at least a portion of the...
6168379 Helicopter rotor blade with a movable flap  
A helicopter rotor blade includes a main airfoil body (12) and a movable control flap (3) incorporated in the trailing edge profile of the airfoil body. The flap (3) is movably connected to the...
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...
6139268 Turbine blade having an extensible tail  
A turbine blade having an extensible tail is described. The extensible tail is selectively positionable during engine operation, enabling fine-tuning for maximum power and efficiency during engine...
6135713 Helicopter rotor blade flap actuator government interest  
An actively controlled helicopter rotor blade includes a trailing edge flap actuated by a fast-acting actuator. A lightweight, rugged, fast-acting actuator suitable for use as the flap actuator...
6065934 Shape memory rotary actuator  
A rotary actuator (18) is provided, including an actuator assembly (20). The actuator assembly includes a torque tube (24) formed of a shape memory alloy, a super elastic NiTinol return spring (26)...
6033180 Rotor blade with a rotary spoiler  
A rotor blade is provided with rotary spoilers rotatably supported in recesses formed in a blade body, respectively, so that the upper surface of each rotary spoiler serves as a portion of the wind...
5934873 Helicopter rotor tip jet  
A helicopter includes a rotor tip jet engine which combines ram compression and centrifugal compression to increase the thrust. A first flow of fuel is dispersed in the ram air and is carried into...
5934609 Deformable propeller blade and shroud  
A propeller blade fabricated from composite material having a plurality of pper layers, each upper layer being flexible and having fibers oriented in a first direction. The material further...
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...
5639215 Helicopter rotor equipped with flaps  
A blade of the rotor is attached to a main rotor shaft, and is rotated counterclockwise at a high speed when viewed from above. In the vicinity of the blade tip, a flap having a wing shape in...
5570859 Aerodynamic braking device  
A spoiler flap is pivotably mounted to the rearward portion of a wind turbine blade or wing to control or influence air flow over the surface of the blade or wing. The spoiler flap has forward and...
5527152 Advanced wind turbine with lift cancelling aileron for shutdown  
An advanced aileron configuration for wind turbine rotors featuring an independent, lift generating aileron connected to the rotor blade. The aileron has an airfoil profile which is inverted...
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...
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...
5456579 Wind turbine blade with governor for maintaining optimum rotational speeds  
A wind turbine blade with governor for maintaining optimum rotational speeds comprising, in combination: a main body portion with a linear leading edge and a trailing edge, a trailing edge, a tip...
5387083 Helicopter servoflap actuator having mechanical stop and oil pump  
In a servoflap system for helicopters, angular positions of the helicopter's servoflaps are controlled by actuators located near the tips of the helicopter blades. Each actuator contains a pump for...
5314308 System for controlling higher harmonic vibrations in helicopter rotor blades  
Higher harmonic control (hereinafter HHC) of helicopter rotor blade vibrations is provided by an actively controlled, rotatable, slotted cylinder which is mounted at an outboard section of each...
5314301 Variable camber stator vane  
Conventionally gas turbine engine compressors have fixed inlet guide vanes to give a predetermined swirl to incoming air at an engine design speed, so that air enters the compressor at an optimum...
5269652 Aerodynamic brake on a wind rotor for a windmill  
A wing for a wind rotor of a windmill has a main part and a turnable part that serves as an aerodynamic brake. The main part of the wing has an outer end spaced radially inward from the wing tip...
5106265 Wind-turbine wing with a pneumatically actuated spoiler  
A flexible spoiler is arranged on the suction side of a wing and spoiler is made of a narrow flexible fold tape covering a tunnel which is sealed against the outer airstream and extends inside the...
Matches 1 - 50 out of 115 1 2 3 >