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7021897 |
Blade pitch control disk device for a rotorcraft rotor
A cyclic swashplate device for controlling rotorcraft blade pitch is disclosed for application to rotorcraft swashplates, in particular, in helicopters. A cyclic swashplate device controls the...
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6666649 |
Helicopter individual blade control system
In an individual rotor blade control device for a helicopter main rotor with a rotor shaft that can be driven by a main drive, with an even number of rotor blades that are arranged on the periphery...
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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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6533549 |
Helicopter
A helicopter with rotor blades rotatably connected to a rotor head. The rotor head is non-rotatably connected with a rotor mast ( 1 ) pivoted in a transmission housing and driven by a transmission...
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6481968 |
Rotor mast of a helicopter
The invention is based on a helicopter having the following features: one rotor head ( 1 ) is non-rotatably connected with a rotor mast ( 3 ) which is rotatably mounted in a housing ( 5 ) of a...
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6461212 |
Automatic start control and clutch of toy engine powered by high pressure gas
A starting device of a toy engine comprises a spring, a starting piece, and a unidirectional bevel gear. The motion of the spring between the two fulcrums serves to ensure that the control rod is...
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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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6280141 |
Swash-plates system for control of the pitch of rotor blades with rotating plate driver
The rotating plate of the system is fixed in rotation with the rotor by a driver with two rigid driving tracks extending axially and diametrically opposite in being fixed in rotation with the...
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6152696 |
Swash-plate device for controlling the pitch of rotor blades with non-rotating plate articulated on a central ball joint
The swash-plates are oscillating mounted by the non-rotating plate on a central ball joint sliding axially around a guide fixed to the structure and on which the ball joint is locked from rotation...
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6109876 |
Helicopter swash plate with integrated pump
In a helicopter with the rotor blades controlled by a swash plate with a stationary part (11) and a rotary part (9) and hydraulic adjusters (4) in a stationary part of the helicopter or in a...
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6099254 |
Helicopter rotor blade control device
In a helicopter having three or more rotor blades, and with mechanical actuation of the rotor blades by a swash plate and a superimposed electrohydraulic active control system, in addition to three...
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5993157 |
Cycloidal propeller having wings operated by hydraulic clutches
A cycloidal propeller to achieve strictly a rudder operation includes accessory apparatuses containing accessory drives. Clutches are used to couple the accessory drives to the propeller shafts,...
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5931639 |
Helicopter blade assembly adapted to permit rapid forward flight
A helicopter blade assembly for permitting rapid forward flight in a helicopter having separate means for providing a forward impetus. The assembly has a set of rotatable blades attached to a...
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5897293 |
Counterweighted propeller control system
A system for controlling functions of a propeller having a plurality of blades is disclosed. The system comprises an electronic control for controlling the functions of the propeller. A plurality...
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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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5810562 |
Composite rotating swashplate for a helicopter rotor system
A composite rotating swashplate for a helicopter rotor system which includes rotor blades with associated control rods. The control rods control the pitch of the rotor blades. The composite...
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5785497 |
Control rod mounting arrangement for helicopter swashplates
A mounting arrangement (60) for coupling a control rod (38) to a stationary swashplate member (32) of a helicopter swashplate assembly (30) wherein the mounting arrangement (60) is characterized by...
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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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5655878 |
Higher harmonic control apparatus for a helicopter rotor
A control system has an HHC actuator having a basal portion and a movable portion. A load acting on the control system is detected by a semiconductor gauge. The load detected by the semiconductor...
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5628620 |
Main rotor system for helicopters
A main rotor is provided for use in a rotary winged model aircraft. The main rotor includes a rotor hub assembly rotatable about a vertical axis and at least two main rotor blades. Each of the main...
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5624232 |
Device for controlling the pitch of the blades of a rotorcraft rotor
The device comprises, in addition to the conventional non-rotating plate and rotating plate of a swashplates device, a secondary rotating plate which can move in translation with the non-rotating...
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5599167 |
Device for controlling the pitch of the blades of a rotorcraft rotor
The device for controlling the pitch of the blades of a rotor using a mechanism having swashplates includes an auxiliary plate mounted on the non-rotating plate of the mechanism and which is...
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5562415 |
Pitch-control devices for hingeless rotors
For each blade, the cuff which is rigid in torsion, surrounding the corresponding rotor attachment twistable arm, bears two opposed pitch levers each articulated to one respectively of two...
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5405104 |
Stopped rotor aircraft utilizing a flipped airfoil X-wing
This invention is directed to stopped rotor Flipped Airfoil X-wing (FAX-WING ™) aircraft which comprises: (a) A rotary wing flight mode which operates similar to a helicopter, wherein all main...
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5310315 |
Low-vulnerability device for the control of helicopter rotor by cyclic plates
The invention relates to a low-vulnerability device for the operation of a lifting and propulsing helicopter rotor by means of a cyclic plate mechanism, in which the non-rotating plate (5) is...
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5199849 |
Helicopter swashplate mounted on articulations uncouled in pitching and rolling
The control device is of the type including two annular disks (3,6), a rotating and non-rotating disk, assembled by at least one ball bearing (20) and mounted concentrically about the rotor shaft...
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5188512 |
Helicopter blade pitch control system
A helicopter blade pitch control system allows blade pitch to be controlled with regard to the degree of rotational position of the blade with respect to the direction of travel and also the degree...
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5165854 |
Mechanism for controlling pitch change in helicopter blades
Mechanism for controlling pitch changes in helicopter blades, related to the helicopter mast and connected to a lever assembly mounted into the structure, having a pair of command arms, the...
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5163815 |
Rotor blade control mechanism
A rotor blade control mechanism includes a transmission driving a hollow rotating drive shaft, extending through the transmission. A rotor head is attached to a top end of the drive shaft and...
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5135356 |
Swashplate anti-drive linkage for rotor controls of rotary wing aircraft
An anti-drive device for restraining against rotation the stationary ring of a rotor control system of a rotary wing aircraft includes a drive tube driveably connected to an engine through a...
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5083725 |
Elastomeric swashplate configuration for helicopters
A swashplate configuration for helicopter which eliminates the need for scissors linkages through the use of a centering member capable of tilt and axial translation while driving torque to the...
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5074494 |
Elastomeric swashplate configuration for helicopters
A swashplate configuration for a helicopter which eliminates the need for a uniball centering bearing and either a stationary or rotating scissors linkage through the use of elastomeric bearing...
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5067875 |
Composite scissors for a swashplate
A flexible composite scissor assembly is disclosed which utilizes one or more composite straps disposed either in a radial or non-radial relationship between a hub attached to a rotor and an inner...
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4958786 |
Active control mechanism for a helicopter
The rotor damping and control power value can be made arbitrary by controlling a cyclic pitch control mechanism with a signal proportional to the angular acceleration of the attitude angle θ, a...
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4957413 |
Omnidirectional variable thrust propeller
An omnidirectional variable thrust propeller for a vehicle includes a hub, plurality of blades, and a plurality of shafts. Each shaft is coaxially rotatably connected to a respective blade and...
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4952120 |
Control device for monocyclic pitch in a fixed reference system and multicyclic pitch in a rotating reference system for blades of rotors of rotor craft
The invention relates to a control device for monocyclic pitch in a fixed reference system and multicyclic pitch in a rotating reference system, for the blades (7) of a rotor craft. In addition to...
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4930988 |
Individual blade control system for helicopters
A control system for providing individual blade control inputs to a four-bladed helicopter rotor. Limited authority series actuators located in a non-rotating portion of the helicopter are driven...
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4914976 |
Five and six degree of freedom hand controllers
A five or six degree of freedom device which includes a two or three degree of freedom wrist action hand controller and in which additional degrees of freedom are provided by motion of an...
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4899641 |
Electro-hydraulic helicopter system having individual blade control
A novel electro-hydraulic control system for use with a helicopter includes a plurality of electro-hydraulic modules which provide control signals to corresponding blade actuators. A controller...
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4804315 |
Composite helicopter swashplate
A helicopter composite swashplate ring that has a triaxial braided tubular ring that withstands both forces in-plane and normal to the plane of the swashplate. The triaxial braided tubular ring...
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4800798 |
Control surface dual redundant servomechanism
A dual redundant servomechanism for moving aircraft control surfaces is disclosed. The servomechanism is of the type whose input commands, from the pilot of the aircraft, are transmitted...
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4789305 |
Self-feathering rotary wing
A controllable lifting rotary wing for an aircraft wherein each rotor blade is mounted in such a manner that it has freedom to oscillate in pitch about its feathering axis. The aerodynamic center...
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4778340 |
Main helicopter rotor
A main helicopter rotor on which a rotary tubular shaft supports, at its top end, an annular hub integral with the tubular shaft itself. The assembly consisting of the tubular shaft and the hub is...
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4697986 |
Helicopter blade cyclic pitch control system
A control and actuating system for adjusting the cyclic pitch of the blades of a helicopter automatically and independently in response to the blade gyrating angular position and to the helicopter...
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4688993 |
Tangential link swashplate centering member
Links (48-50) tangential to the rotorshaft (30) and connected to the inner swashplate ring (38) center the swashplate and restrain it from rotating (in the case of a stationary inner ring) by...
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4669958 |
Swashplate control system
A swashplate control system (10) has a first gimbal ring (26) pivotally mounted at (32) along a longitudinal axis. A second gimbal ring (24) is pivotally attached at (28) to the first gimbal ring...
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4650400 |
Helicopter blade pitch adjusting system
A helicopter blade positioning mechanism provides collective and cyclic pitch angle adjustment of the blades independently. This mechanism is all enclosed within the blade driving axle. The pitch...
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4630998 |
Apparatus for control of collective and cyclic pitch of the blades of a rotor
Apparatus for controlling both collective and cyclic pitch of blades of a helicopter rotor comprises a non-rotating plate which is connected via a fixed caliper and servo controls to a fixed...
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4611971 |
Device comprising cyclic plates driven by flexible blades, for controlling a helicopter rotor
A device comprising cyclic plates driven by flexible blades for controlling a helicopter rotor. The device comprises upper flexible curved blades pivotably mounted on the rotor shaft, above the...
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4588355 |
Flexible swashplate centering member
Centering and stabilizing against rotation of a helicopter swashplate stationary ring are provided by spokes that are attached between the airframe and the stationary ring. When the swashplate...
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