Matches 1 - 50 out of 297 1 2 3 4 5 6 >
Match Document Document Title
7434764 Variable speed gearbox with an independently variable speed tail rotor system for a rotary wing aircraft  
A gearbox of a rotary-wing aircraft includes at least one variable speed system which optimizes the main rotor speed for different flight regimes such as a hover flight profile and a high speed...
7413142 Split torque gearbox for rotary wing aircraft with translational thrust system  
A gearbox of a high speed compound rotary-wing aircraft includes a main module, an input module and a translational thrust module. The input module receives power from the engines to drive a dual,...
7406370 Electrical energy management system on a more electric vehicle  
An electrical energy management system ( 100 ) for a more electrical vehicle is provided. The electrical energy management system ( 100 ) includes a vehicle operation system ( 120 ) for controlling...
7377466 Propulsion system for miniature vehicles  
A propulsion system for miniature vehicles, such as model airplanes, having multiple direct-current motors arranged radially about a central axis of the propulsion system that drive a propeller...
7364116 Automatic control systems for aircraft auxiliary power units, and associated methods  
Systems and methods for operating aircraft power systems are disclosed. A power system in accordance with one embodiment of the invention includes an aircraft auxiliary power unit and a controller...
7351174 Twin turbo-shaft engine with accessory gearbox drive means  
The twin turbo-shaft engine according to the invention comprises a high pressure rotor and a low pressure rotor, at least one accessory gearbox driven by mechanical transmission means, main drive...
7270296 Small-size high-speed transmission system for use in microturbine-powered aircraft  
A transmission system that is used in conjunction with a microturbine engine for propelling an aircraft body, such as a propeller-based fixed-wing aircraft or a rotor-based vertical lift aircraft,...
7011275 Internal spur gear drive  
An internal spur gear drive has a mounting base including one or more sets of motor mounting lugs extending therefrom, for attaching a corresponding number of drive motors thereto. A drive shaft...
6941195 Method and device for allocating thrust  
Force balance and moment balance associated with thrust of air and water craft equipped with thrust generators are preset in view of non-linear characteristics and dynamic characteristics of thrust...
6935479 Drive apparatus  
A drive apparatus is provided to transmit force from a source of power to a driven assembly, such as a pump, in an aircraft. The drive apparatus can be operated from a disengaged condition back to...
6883752 Vibration damper for aircraft engine  
An internal combustion engine for an aircraft is described. The internal combustion engine includes a crankshaft defining first and second ends, a propeller, and a transmission disposed between the...
6883750 Split torque gearbox with pivoted engine support  
A powerplant system for a vehicle such as a hybrid UAV includes a miniature gas turbine engine and a gearbox assembly. The engine is mounted to the gearbox assembly through a support structure...
6863239 Fluid conduit for use with hydraulic actuator  
A fluid conduit is provided for use in a hydraulic actuating system for controlling an instrumentality disposed on a rotating portion of a machine. The fluid conduit transports pressurized fluid...
6840479 Airframe mounted accessory drive (AMAD) power take-off shaft auxiliary power generation  
In an aircraft having an engine and an AMAD, a power take off shaft is rotationally connected to the engine, and the power take off shaft provides rotational power from the engine. A power...
6676073 Pivoting power transmission unit with peripheral face toothed gearwheels of the face gear type  
A pivoting power transmission unit is provided for transmitting rotational drive from a power source to a rotor configured to revolve about a first axis and configured to swivel about a second axis...
6664656 Aircraft electrical power distribution network  
A data collection network and electrical power distribution network designed to reduce airplane wire weight and allow nearly complete wiring design and installation of wiring and equipment in the...
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...
6554729 Steer-drive for boats and planes  
A steer-drive for vehicles primarily operated in fluids (e.g., boats and planes) interposes respective left and right orbital gear drives into the vehicle drivetrain between the engine/transmission...
6484967 Drive unit for a model helicopter  
The present invention relates to a drive unit for a model helicopter comprising a fuselage in the central portion of which both the drive unit and a rotor shaft 1 are supported, characterized in...
6467726 Aircraft and torque transmission  
An aircraft including an airframe having a fuselage which extends longitudinally, and having fixed wings including a main wing, a horizontal tail wing and a vertical tail wing. A propeller-rotor...
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...
6416016 Actuator for an active transmission mount isolation system  
An actuator is disclosed for an active vibration and noise control system in an aircraft. The actuator is configured to attach a vibrating component, such as a gearbox mounting foot, to an aircraft...
6394387 Rotor shaft support and drive arrangement  
A rotor shaft support and drive arrangement comprises a bearing damper including a number of interconnected oil cylinders circumferentially distributed about a rotor to dampen the vibration...
6364253 Remote piloted vehicle powered by beamed radiation  
An airborne remote piloted vehicle does not require onboard fuel to greatly extend its endurance and payload capability. Photovoltaic cells are provided on substantially the entire bottom surface...
6364249 Engine integrated with rotary wing aircraft transmission  
A power plant and transmission arrangement for a helicopter wherein the helicopter engine is integrated to the helicopter transmission to form therewith a single unit rigidly mounted to the...
6302356 Helicopter two stage main reduction gearbox  
A twin turbine engine helicopter has a two-stage main reduction gearbox, the input stage having a speed reduction ratio exceeding 5.5:1, into an epicyclic gear train second stage ratio about 6:1...
6293491 Vertical take-off and landing aircraft  
The invention concerns a vertical take-off and landing aircraft (10) with a plurality of lift (26a-26p) and thrust rotors (20a,20b), in which all rotors have their own electric motor...
6279852 Drive system for a propeller driven transport aircraft  
The drive system of a propeller driven transport aircraft has first and second propeller doublets mounted in the plane of the aircraft wings, each propeller doublet including two propellers...
6264138 Propeller gearbox  
An aircraft (10) having turboprop propulsion has a plurality of gas turbine engines (11), each with a two stage reduction gearbox (30,41) with the engine output shaft (17,17A) inline with the...
6227481 Method and apparatus for controlling force fights in a rotating shaft  
An improved tilting rotor aircraft, a control system for an elongated shaft, and a method of controlling an elongated shaft are provided. Sensors are utilized to detect an amount of twist on a...
6131848 Roadable airplane drive through an automotive transaxle  
A roadable airplane consists of a single-seat three-wheeled vehicle with wing panels hung longitudinally on the sides of the chassis for road use and attached transversely to a spar box for flight....
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...
6079667 Auxiliary inlet for a jet engine  
An auxiliary inlet (60) for a jet engine has a first rod block (62) attached to a first side (64) of a hole (66) in a skin (68) of an inlet of the jet engine. A second rod block (80) is attached to...
6050521 Releasable coupling for a helicopter tail rotor power transmission line  
A releasable coupling for a power transmission line to a tail rotor of a foldable-tail-section helicopter, the coupling having a first and a second coupling assembly fitted respectively to the body...
6029930 Method of monitoring a transmission assembly of a vehicle equipped with acceleration sensors, in particular a helicopter  
The monitoring method includes the steps of: acquiring a signal from an acceleration sensor; calculating a transform in the frequency domain of the signal to obtain a sequence of samples; acquiring...
6024324 Method of monitoring an epicyclic assembly of a vehicle equipped with acceleration sensors in particular a helicopter  
The monitoring method includes the steps of: acquiring a signal from an acceleration sensor associated with an epicyclic assembly; sampling the signal at a predetermined sampling frequency to...
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...
6019310 Method of monitoring on the basis of signal energy a transmission assembly of a vehicle equipped with acceleration sensors in particular a helicopter  
The method includes the steps of: acquiring a signal from an acceleration sensor; calculating the Fourier transform in the frequency domain of the signal to obtain a sequence of samples; acquiring...
6016994 Method of monitoring a transmission assembly of a vehicle equipped with acceleration sensors, in particular a helicopter  
The monitoring method includes the steps of: acquiring a first signal from an acceleration sensor; calculating a transform in the frequency domain of the first signal to obtain an initial sequence...
6016993 Method of monitoring a transmission assembly of a vehicle equipped with acceleration sensors, in particular a helicopter  
The method includes the steps of: acquiring a signal from an acceleration sensor; calculating the Hilbert transform of the signal filtered and sampled beforehand; defining a complex signal having...
5836545 Rotary wing model aircraft  
A model rotary wing aircraft is provided that includes a fuselage, a power plant, a main rotor, a tail rotor, and a drive apparatus. The power plant includes a passive cooling system to transfer...
5823470 Split torque proprotor transmission  
A conversion access gearset includes a first bevel gear, which is connected to a wing cross shaft leading from the proprotor drive train path to the second turbine engine. A second bevel gear is...
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...
5807202 Differential speed transmission  
A transmission for changing the rotational speed of an engine input shaft to a driven output shaft. The transmission includes a first and second face gears. Each face gear has first and second sets...
5807149 Airboat systems and methods for increasing engine efficiency while reducing torque and noise  
An airboat propelling system is provided wherein a propeller is rotated by a hollow driven shaft. A further embodiment is provided wherein two propellers are rotated in opposite directions by...
5797185 Method of making an isolated ring gear for planetary gear drive systems  
An isolated ring gear (60) for a planetary gear drive system (12), which isolated ring gear (60) is operative transferring torque loads and reducing the transmission of high frequency vibrations...
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...
5782433 Engine deceleration device and power transmission device for helicopters  
Each engine is directly coupled to an engine deceleration device composed of a traction speed change mechanisms and a planetary speed change mechanism, and is decelerated at a desired speed change...
5645250 Multi-purpose aircraft  
Several innovative systems for an aircraft, and aircraft incorporating them, are disclosed. Features include inboard-mounted engine(s) with a belt drive system for turning wing-situated propellers;...
5472386 Stacked compound planetary gear train for an upgraded powertrain system for a helicopter  
A stacked compound planetary gear train for an upgraded powertrain system for a helicopter that provides an increased reduction ratio to accommodate the increased horsepower output of the augmented...
Matches 1 - 50 out of 297 1 2 3 4 5 6 >