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Match Document Document Title
7231997 Hybrid drive powered lift platform  
An air-based thrust recovery system for use in a powered lift platform utilizing fixed-pitch propellers is provided. The system utilizes an air compressor coupled to the drive motor of the platform...
7178757 Motorcycle rider autogyro  
An autogyro, or aircraft with a rotating wing, has an airframe providing a motorcycle-like configuration for the rider. The motorcycle-like straddle-type seat locates the rider in front of the...
7104499 Rechargeable compressed air system and method for supplemental aircraft thrust  
A system for providing aircraft thrust includes a compressor, operable to take in a quantity of air, reduce the volume of the air to generate compressed air, and to deliver the compressed air to a...
7077358 Helicopter with torque-correcting thruster device  
A helicopter having a torque-correcting thruster device. The helicopter has an aerodynamic body which has opposite side portions, a top portion and a bottom portion. The aerodynamic body has a...
7063289 Helicopter tail section  
A vertical stabilizer ( 38 ) is supported by and projects upwardly and rearwardly from the tail portion ( 14 ) of a helicopter fuselage ( 12 ). A tail rotor (TSR) is mounted on the vertical...
7032860 Emergency anti-torque thruster system  
An anti-torque thruster system implemented onboard an aircraft comprising a propulsion means coupled to the aircraft, wherein the propulsion means is capable of providing a measure of anti-torque...
6929215 Rotor system for helicopters  
A tail rotor system for a helicopter includes a gear box housing retainer ( 66 ) coupled to the tail boom ( 16 ) of the helicopter. The tail rotor system also includes a power-limiting device ( 50...
6869045 Helicopter tail section and retrofit method  
A vertical stabilizer ( 38 ) is supported by and projects upwardly and rearwardly from the tail portion ( 14 ) of a helicopter fuselage ( 12 ). A tail rotor (TSR) is mounted on the vertical...
6863240 Hovering body  
To achieve the required optional conformability and navigability of the hovering motion of the hovering body in a free liquid environment, the hovering body is equipped with a suitable created...
6758436 Pneumatic driven propeller related vehicles  
A propeller related vehicle in accordance with one embodiment of the present invention is described as a helicopter having an airframe housing a pneumatic motor mechanism for powering a main...
6755374 Anti-Torque and yaw-control system for a rotary-wing aircraft  
A preferred embodiment of a rotary-wing aircraft comprises a main rotor, a tail boom extending through an area of downwash from the main rotor, and a linear nozzle fixedly coupled to the tail boom...
6732973 Stabilizer for a propeller related vehicle  
A stabilizer attached between a propeller and a shaft; and the propeller is pivotally mounted to the shaft in a substantially perpendicular plane to the shaft. The stabilizer has a tendency to...
6729576 Composite tail cone assembly  
The present invention broadly relates to a tail cone assembly for a helicopter. The tail cone assembly includes a monocoque shell formed from a composite material. The composite material preferably...
6715711 Hub-protecting cap for a helicopter tail rotor  
A hub-protecting cap for use with a helicopter. The helicopter has a fuselage, a tail rotor assembly operatively coupled to the fuselage for rotation relative to the fuselage about a tail rotor...
6666404 Tripodal modular unmanned rotorcraft  
Conventional rotorcraft are required to provide a significant amount of anti-torque movement to offset the torque created by the rotor and the right-angle gearbox coupling the rotor to the engine....
6612195 Split-torque face gear transmission  
A face gear transmission system divides the input torque into multiple kinematic paths. The first kinematic scheme consists of a drive shaft and driven shaft having a plurality of pinions which...
6371408 Helicopter tail rotor authority altitude compensator  
Apparatus and methods for automatically altering tail rotor authority on a helicopter based on ambient air pressure and temperature changes utilizing a sealed bellows which extends or retracts...
6352220 Helicopter tail boom with venting for alleviation and control of tail boom aerodynamic loads and method thereof  
In at least one embodiment, the apparatus of the invention is a flight vehicle tail assembly having an exterior surface, at least one first vent in the exterior surface, at least one second vent in...
6290171 Device for controlling a helicopter hybrid countertorque system  
The present invention relates to a device (1A) for controlling a hybrid countertorque system of a helicopter (He), which comprises a countertorque rotor (R2), and at least one aerodynamic steering...
6193189 Rotary engine and helicopter application  
In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the...
6161800 Pivoting spanwise-flow redirector for tiltrotor aircraft  
A tiltrotor aircraft includes a spanwise-flow redirector having a pair of flow-redirection panels respectively mounted on the aircraft's mid-fuselage area for rotation about a panel pivot axis...
6142418 Multi-path secondary power system for an aircraft  
An improved single engine military aircraft is provided through the use of an improved secondary power system which incorporates an additional accessory drive, and utilizes improved multi-path...
6123291 Device for controlling an aerodynamic surface for balancing a helicopter in terms of pitch  
A device for controlling an aerodynamic surface (E) for balancing in terms of pitch a helicopter (He) including a main rotor (R1), the fore-and-aft cyclic pitch of which is controllable by a...
6098921 Rotary wing aircraft supplementary power drive system  
A supplementary power drive system for providing additional power to the drive system of rotary wing aircraft that powers the aircraft main lifting rotor and tail mounted torque compensating rotor...
6086016 Gyro stabilized triple mode aircraft  
A triple mode aircraft which can take off as a helicopter, or in gyrocopter mode with no power to the rotors or as a conventional aircraft obtaining lift from a circular wing and in another...
6077041 Reduction drive and torque-limiting clutch for autogyro aircraft  
A rotary wing aircraft has an engine, an engine-driven shaft and a main rotor. A rotor drive shaft is mounted to the main rotor and extends substantially 90 degrees to the engine-driven shaft. A...
6065718 Universal VTOL power and rotor system module  
A universal power drive and lifting rotor system module adaptable for powering various types of single and multiple rotor VTOL aircraft comprising an elongated component support framework on the...
6053452 Compensation apparatus for main rotor torque  
A main rotor torque compensation apparatus for a helicopter having a main rotor and a tail rotor includes vertical tails that are supported at a variable angle of attack. An actuator adjusts the...
6036141 Jet thruster for helicopter antitorque and yaw control system  
An improved jet thruster system for use in a helicopter without a tail rotor. A non-rotating outer thruster assembly is attached to the rear of the tail boom which, within it, has a source of low...
6021976 Operation of a helicopter  
6019313 Installation for mounting an engine on a deck and for connecting its output shaft to at least one driven mechanism  
An installation for connecting the output shaft of the engine and the input shaft of the transmission box together including a transmission shaft having a certain amount of flexural flexibility and...
5996933 Aircraft  
For an aircraft (1) having a balancing torque and including a motor-driven propeller (5) arranged on a central axis (3), and a useful load container (6), a solution should be provided which would...
5934608 Efficient bi-directional air flow deflector  
The bi-directional air flow deflector of the present invention efficiently deflects air to the left opening and the right opening, and minimizes any vertical components of force which may be...
5820073 Helicopter having a balanced torque transmission and no tail rotor  
An improved helicopter transmission which which has previously been transmitted from the engine to the main rotor comprising a pair of sun gears connected by a plurality of planetary gears which...
5813292 Method for fabricating a split path transmission system providing equal torque splitting between the split load paths of each gear train thereof at a predefined operating point  
A method for fabricating a split path transmission system that achieves equal torque splitting between the forward and aft split load paths of each gear train thereof at a predefined operating...
5810285 Drive shaft casing for a ducted fan anti-torque device  
A drive shaft casing for a ducted fan anti-torque device for reducing the radar signature of the drive shaft, while concurrently having a minimal impact on the drive shaft's acoustic signature. The...
5791594 Helicopter conversion  
A special purpose helicopter based on an existing airframe, power train, and engine, modified to provide greatly enhanced performance, payload, speed and maneuverability. The modification consists...
5791592 Helicopter with coaxial counter-rotating dual rotors and no tail rotor  
A helicopter having two engines driving a single rotating drive shaft on which are mounted two spaced counter-rotating coaxial rotors at the same speed and having a tail boom free of a tail rotor...
5749540 System for controlling and automatically stabilizing the rotational motion of a rotary wing aircraft  
In a helicopter having a device for stabilizing yaw motion through the use of a tail rotor with a plurality of rotor blades extending radially from a hollow rotor shaft which is mounted for...
5738301 Rotary-wing aircraft of the compound type, and rear structural element for such an aircraft  
The present invention relates to a rotary-wing aircraft, especially such as a helicopter, of the compound type including: a fuselage (2), fixed-wing elements (6) arranged on either side of...
5676335 Airflow control system for a helicopter  
A system is disclosed for controlling the external flow passing along the external surface of an aircraft such as the tailboom of a helicopter. A fan blows air into a cavity within a surface, and...
5649678 Operation of a helicopter  
In a helicopter having a main rotor, a tail boom and a circulation control slot along one side of the tail boom, and a thruster which is selectively directable at either side or both sides of the...
5634611 Counter-torque device with rotor and flow straightening stator, both of which are ducted, and inclined flow-straightening vanes  
A flow-straightening stator is fixed into the duct downstream of the rotor mounted so that it rotates in this duct, and includes vanes with aerodynamic profile which straightens out the airflow...
5609312 Model helicopter  
A fuselage structure for use on a model helicopter includes a longitudinally extending keel defined by a vertical flat plate oriented to lie in parallel relation to a longitudinal axis of the model...
5607122 Tail rotor authority control for a helicopter  
An apparatus for interconnection in a helicopter tail rotor control linkage for changing the pitch of the tail rotor blades in response to predetermined inputs is provided. The apparatus comprises...
5605440 Flow-straightener vane made of composite, flow-straightener including it, for a counter-torque device with ducted rotor and ducted flow-straightening stator, and method for manufacturing them  
The composite vane is moulded by injecting resin into a preform of layers of reinforcing fibres according to the RTM method. The skins of its main vane section as well as of its root and tip via...
5601257 Air vehicle yaw control system  
The yaw control in an air vehicle having counter rotating rotors is provided by selectively and controllably applying a frictional drag or braking force to drive gears for the two rotors. Each of...
5566907 Counter-torque device with ducted rotor and phase modulation of the blades, for helicopter  
The blades of the rotor which can rotate in the transverse duct have an angular distribution according to an uneven azimuth modulation given by the following sinusoidal law: Θn=n×360°/b+ΔΘ...
5544844 Autogyro aircraft  
An autogyro has a teetering semi-rigid rotary wing with rigid rotor blades. The angle of attack (blade pitch) of the rotor blades is fully adjustable in flight continuously over an operational...
5498129 Counter-torque device with ducted tail rotor and ducted flow-straightening stator, for helicopters  
The rotor is supported within the duct by a stationary flow-straightener with vanes connecting the wall of the duct to a central body housing the mechanism for driving the rotor. This mechanism is...
Matches 1 - 50 out of 210 1 2 3 4 5 >