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7604198 |
Rotorcraft having coaxial counter-rotating rotors which produce both vertical and horizontal thrust and method of controlled flight in all six degrees of freedom
A rotorcraft and method for providing controlled flight which provides flight in all six degrees of freedom of pitch, roll, yaw, up/down, forward/rear, and left/right. The rotorcraft includes a...
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7520466 |
Gyro-stabilized air vehicle
A vertical takeoff and landing (VTOL) air vehicle disclosed. The air vehicle can be manned or unmanned. In one embodiment, the air vehicle includes two shrouded propellers, a fuselage and a...
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7475847 |
Retractable lifting blades for aircraft
A rotor blade assembly for providing vertical lift to an aircraft, having a rotor head and a plurality of blades, with each blade attached to a mechanism such as a cam surface, whereby movement of...
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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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7448571 |
Rotor collective pitch VS Mu to control flapping and mast/rotor tilt to control rotor RPM
A method of operating a rotor aircraft involves measuring an airspeed of the aircraft and a rotational speed of the rotor. A controller determines a Mu of the rotor based on the airspeed of the...
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7433765 |
Fly by wire static longitudinal stability compensator system
A static longitudinal stability (SLS) system provides an unobtrusive airspeed hold function that reacts to the pilot control inputs into the flight control system and the measured states of the...
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7306186 |
Tandem powered power tilting aircraft
Vertical take-off aircraft ( 1 ) has first ( 4 ) and second ( 17 ) lifting mechanism (eg helicopter-type rotors, jets, turboprops) arranged in tandem, either above or outboard of ends ( 2, 3 )....
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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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7264199 |
Unloaded lift offset rotor system for a helicopter
A rotor system ( 12 ) for a helicopter ( 10 ) includes a rotating shaft ( 82 ). A gimbaled hub assembly ( 56 ) is coupled to the rotating shaft ( 82 ). Rotating blades ( 24 ) and non-rotating...
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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...
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7150429 |
Tandem powered power tilting aircraft
An aircraft with a long body 1 which has a forward end 2 and an aft end 3 , which is able to achieve vertical take-off by means of a tiltable rotor and blade assembly 4 at the forward part...
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7137590 |
Lubricating installation for rocking power transmission box
An installation includes at least a pressurized lubricating circuit for elements housed in the rocking crankcase, each circuit including a radial transfer bearing between two opposite cylindrical...
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7128293 |
Helicopter
A helicopter has a power unit supported on an arch support member above an airframe. The power unit may be moved forward and rearward by a trim actuator to trim the helicopter and tilted about...
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7118340 |
Swashplate and pitch link arrangement for a coaxial counter rotating rotor system
A coaxial counter-rotating rotor system for a hybrid aircraft includes an upper swashplate assembly and a lower swashplate assembly with a coaxial transmission system therebetween. Movement of the...
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7004426 |
Control system for rotorcraft for preventing the vortex ring state
A flight control system for a rotorcraft to prevent the adverse effects of the vortex ring state is disclosed. In the flight control system of the present invention, selected control inputs are...
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6915983 |
Pivoting power transmission unit with load transfer via the casing
A pivoting power transmission unit is provided for driving a tiltable rotor of a convertible aircraft. The casing of the pivoting transmission unit comprises a lower casing, by which the casing is...
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6863241 |
Control of an aircraft as a thrust-vectored pendulum in vertical, horizontal and all flight transitional modes thereof
An improved aircraft includes a thrust source, a wing, and a boom functioning as a “free lever” and having a distal end upon which the thrust is acting and a proximal end about which the boom...
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6824096 |
Device for controlling the pitch of the blades of a convertible aircraft rotor
A pitch control device for a blade of a tilting rotor of a convertible aircraft. The pitch control device is external to a rotor hub which is driven in rotation by a mast and connected to the...
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6745977 |
Flying car
A vehicle is in the general shape of a land vehicle, such as a car, but has a plurality of rotors so the vehicle is capable of flight in the manner of a VTOL or a helicopter. The vehicle has foot...
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6719244 |
VTOL aircraft control using opposed tilting of its dual propellers or fans
The invention relates to improvements with regards to the control of VTOL aircraft that use two propellers or fans as the primary lifting devices in hover. More particularly, the invention is a...
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6695254 |
Rotary-wing aircraft rotor with constant velocity drive
A tilting rotor of a convertible aircraft comprises, between the mast and the hub, a constant velocity drive mechanism and pivoting arrangement comprising two gimbals, each of which is driven by...
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6691830 |
Device for lubricating a power gearbox with a variable orientation, particularly for a convertible tilt-rotor aircraft
A device for lubricating a power gearbox having a variable orientation and a closed space has a lubricating unit that supplies lubricant to at least one element of the gearbox, which needs to be...
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6676074 |
Dual piston drag damper for rotary-wing aircraft rotor
A drag damper for use on a rotary wing aircraft rotor comprises a body defining two variable volume chambers linked by a piston. The chambers are filled with fluid and are connected by a...
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6619585 |
Helicopter single-blade rotor
The present invention relates to a single-blade main rotor for helicopters designed so that the component of the blade lift normal to the rotational axis of the rotor is compensated by the inertial...
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6616095 |
Coupled aircraft rotor system
The subject tiltrotor aircraft has three modes of operation: airplane mode, helicopter mode, and transition mode. A tilting mast, which transitions the aircraft between airplane mode and helicopter...
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6467724 |
Articulated drive
An aircraft has a fuselage designed essentially as an aerostatic lift body and combined lift and propulsion devices which are articulated on the fuselage, are provided with propellers and form...
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6405980 |
Control system for rotor aircraft
A rotor aircraft has an adjusting mechanism that controls the sensitivity of the control stick relative to fore and aft tilt of the rotor. The control stick is pivotable between fore and aft...
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6325326 |
Cyclic and collective pitch control device for a helicopter rotor
A cyclic and collective pitch control device for a helicopter rotor, fitted about a fixed casing having an axis, and having a substantially sleeve-shaped movable element fitted in axially-sliding...
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6293492 |
Coaxial twin-rotor type helicopter
A one-man helicopter 1 in which a drive transmission 10 that transmits driving force to upper and lower rotors 5 and 6 comprises first and second planet gear mechanisms 100 and 200 provided with a...
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6231005 |
Device for the individual control of the rotor blades of the rotary wing structures of aircraft with multiple swashplates
The device for the individual control of the blades includes at least two sets of rotating swashplates centered on the rotor axis and non-rotating swashplates at least inclinable in all directions...
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6182923 |
Helicopter with control by displacement of its center gravity
In the case of a helicopter comprising a rotor system (3) with rotor blades (6 and 6') held on a fuselage (2) and at least one rotor shaft (5 and 5') and furthermore comprising a drive system (4)...
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6170779 |
Rotor pitch lock for rotary/wing aircraft
The present invention comprises an apparatus for locking the pitch axes of the rotor blades of a rotor/wing aircraft so as to form a rigid wing. In one embodiment of the present invention the rotor...
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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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6138943 |
Foldable ascending/descending wing stand for flying apparatus
A fordable ascending/descending wing stand for a flying apparatus is disclosed. The wind stand includes a base supported on a car by a number of supporting rods. A frame is mounted on the base,...
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6089501 |
Tandem-rotor gyroplane
A tandem-rotor autogiro has a control system that facilitates operation of the tandem-rotor autogiro by fixed-wing aircraft pilots, without the requirement of extensive additional flight training....
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6062508 |
Compound aircraft
A lift rotor assembly for a compound aircraft having a fuselage, including at least one circular disk structure with a plurality of bladelets spaced peripherally thereabout, a drive shaft coupled...
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6045090 |
Device for reducing the vibrations generated by a lift rotor of a rotary-wing aircraft
The present invention relates to a device for reducing the vibrations of the rotor of a rotary-wing aircraft, having an oscillating mass (M1), elastically held radially on the hub (4) of the rotor...
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6032899 |
Blade pitch locking device for a main rotor of a rotary-wing aircraft
The present invention relates to a device for locking the pitch of the blades of a main rotor of a rotary-wing aircraft in which each blade is firstly rotated about an axis of rotation of the rotor...
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5996934 |
Tethered autogyro
A tethered autogyro including means for tilting the autogyro rotor to compensate for differences in relative air pressure on rotor blades while minimizing frictional pressures restricting rotor...
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5971325 |
Compensation for rotorcraft pitch axis control saturation
A control system for small unmanned rotorcraft compensates for vehicle pitch control saturation caused by the need for sudden vehicle pitch attitude correction, in turn often caused by wind gusts....
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5971320 |
Helicopter with a gyroscopic rotor and rotor propellers to provide vectored thrust
A model helicopter creates lift using rotor propellers mounted to the rotor arms of a gyroscopic rotor assembly. A controller converts front-back, and left-right inputs into speed control signals...
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5853145 |
Rotor head for rotary wing aircraft
A flexible beam rotor assembly for an aircraft includes a rotor spar having an axis of rotation and a hole through which the axis of rotation passes. A spindle has a teetering connection to the...
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5826822 |
System and method for providing cyclic and collective pitch control in a rotary wing aircraft
A cyclic and collective control system is provided for controlling rotor pitch in a rotary wing aircraft. The rotor blades are pivotally mounted on a hollow, spinning shaft. An angularly and...
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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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5788182 |
Bidirectional antivibration suspension device for helicopter rotor
The bidirectional suspension comprises, in order to connect the transmission gearbox to the fuselage, two parallel connecting rods which are articulated to lateral supports on opposite sides of the...
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5765783 |
Vertically launchable and recoverable winged aircraft
A vertically launchable and recoverable winged aircraft includes an airframe, a least one proprotor connected to the airframe through a rotatable drive shaft, and collective and cyclic pitch...
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5765777 |
STOL/VTOL free wing aircraft with variable pitch propulsion means
A VTOL/STOL free wing aircraft includes a free wing having wings on opposite sides of a fuselage connected to one another respectively for free rotation about a spanwise access. Improved control...
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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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5740987 |
Helicopter cyclic control assembly
A helicopter cyclic control assembly for redirecting the thrust produced at a main rotor assembly includes a rotor disc control plate having arms with arm tubes therein for close, slideable...
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5678786 |
Reconfigurable helicopter flight control system
A failure of any one of three swashplate actuators of a helicopter rotor blade is detected. Once such a detection is made, the position of this nonfunctional swashplate is locked and measured. The...
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