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8092174 |
Wind turbine and method for determining at least one rotation parameter of a wind turbine rotor
A method of determining at least one rotation parameter of a wind turbine rotor rotating with a rotation speed and a phase is provided. The method comprises the steps of: measuring an effective...
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7928593 |
Method for damping oscillations in a wind turbine
The present invention relates to a method for damping oscillations in a wind turbine comprising a wind turbine tower, a nacelle arranged on top of said wind turbine tower, and a number of rotor...
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4545728 |
Wind turbine generator with improved operating subassemblies
A wind turbine includes a yaw spring return assembly to return the nacelle from a position to which it has been rotated by yawing forces, thus preventing excessive twisting of the power cables and...
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4518313 |
Wind blade vibration eliminator for helicopters
An improvement to a rotating blade is disclosed in a device that will apply variable moment forces to wind blades which are counter to the variable forces normally encountered in typical wind...
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4352629 |
Wind turbine
A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine...
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4302152 |
Anti-moment gyro for windmill
An improvement to rotating blades is disclosed in a device that will impose anti-moment forces and result in less stress in the said rotating member. The device consists of a rotating body or gyro...
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4195966 |
Pitch control system for helicopter rotor blades
A system is disclosed for controlling the pitch angle of helicopter rotor blades to compensate for differences in lift generated by advancing and retreating blades during translational flight or...
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4118143 |
Stabilizing and control device for two-bladed helicopter rotors
A stabilizer bar has an aerodynamically shaped member, such as a winglet, on opposite ends thereof, and the bar is connected to rotate on its longitudinal axis and is mounted to tilt about a pivot...
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4025230 |
Advanced control system for a rotor and/or a compound or rotary wing vehicle
The control system includes a sensing mechanism by which a true pure signal from flapping bending activity resulting from an external load force on a rotor blade in a rotor system is generated and...
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3990811 |
Circulation controlled rotary wing aircraft and control system therefor
A control system for rotary wing aircraft having a circulation controlled tor is provided. Two axial flow air compressors driven from the engine input shaft provide an air flow which is ducted to...
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3649132 |
VIBRATION CONTROL FOR ROTORS
A helicopter rotor has weights, one for each blade, mounted on arms which are pivoted remote from the axis of rotation of the rotor. The weights are connected through adjustable linkage mechanism...
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3572965 |
HELICOPTER CONTROL MEANS
Torque motors are interposed in the control linkages used for processing the control gyro of a rigid rotor helicopter. Due to the inherent characteristics of a DC torque motor, this arrangement...
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3520498 |
STABILIZATION OF AIRCRAFT ROTORS HAVING CYCLIC PITCH
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3484172 |
HELICOPTER
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3289770 |
Helicopter rotor system
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3288395 |
Helicopter
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3246862 |
Hybrid aircraft
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3213944 |
Stabilizing means for helicopters
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3144906 |
Rotor blade control and mounting apparatus for rotary wing aircraft
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3135334 |
Rotor
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3135335 |
Helicopter rotor system
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3108641 |
Helicopter control system
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3106964 |
Helicopter rotor
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3080001 |
Helicopter
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3058529 |
Helicopter flight control
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3035643 |
Device to alter dynamic characteristics of rotor systems
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3027948 |
Stabilization of rotary wing aircraft
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2992563 |
System for positioning gimbaled object
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2945131 |
Matching circuit for radiation detectors
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2940526 |
Flight control for gyroplanes
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2939535 |
Rotor for self-stabilizing helicopter
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2845131 |
Rotor arrangement for rotary wing aircraft
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2827968 |
Control of helicopter stability by inertia device
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2818123 |
Rotary wing aircraft
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