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| Number | Title | Issue Date |
| 8167233 | Coaxial rotor aircraft A dual, coaxial rotor helicopter is provided that is relatively easy to fly. Thrust is provided by two ducted fans that are mounted at the rear of the aircraft and spaced apart laterally. Differential thrust generated by the fans provides yaw control for the aircraf... | 05/01/2012 |
| 8056851 | Helicopter antitorque tail rotor A blade for an antitorque tail rotor of a helicopter, having a leading edge and a trailing edge opposite each other and elongated along a longitudinal axis of the blade; the trailing edge, in use, interacts with the air current after the leading edge; the blade also... | 11/15/2011 |
| 8042762 | Vertical take-off tilt rotor aircraft A vertical take-off aircraft having a main power plant at the top of the aircraft to provide lift and an additional power plant to force air to travel in a horizontal direction to counteract the rotational force exerted on the main body of the aircraft by the main p... | 10/25/2011 |
| 7926759 | Tail rotor hub A tail rotor hub system and methods are disclosed. In one embodiment, the system includes a helicopter fuselage connected to a tail rotor assembly that holds tail blades. The assembly includes an elongated tail rotor housing and an elongated blade root fitting that ... | 04/19/2011 |
| 7427046 | Optimized method of controlling yaw for rotary-wing aircraft, and a system for implementing it A method of the invention for controlling the pitch of the blades of a tail rotor of a rotary-wing aircraft includes the following operations: a) generating a main control for the pitch of the blades of the tail rotor as a function... | 09/23/2008 |
| 7240648 | Radial engine A four-stroke radial engine comprises cylinders arranged radially with respect to a driving shaft of said radial engine and pistons associated with said cylinders, said pistons being connected to said driving shaft by means of respective connecting rods which are ro... | 07/10/2007 |
| 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 and an on-board, high pressure tank for air storage. The fixed-pitch... | 06/19/2007 |
| 7198223 | Ultralight coaxial rotor aircraft An ultralight coaxial dual rotor helicopter having a substantially L shaped frame. Attached to the back of the frame is a vertical shaft engine, and a pair of yaw paddles for controlling yaw of the craft. The drive shaft connects to a belt drive at the top of the fr... | 04/03/2007 |
| 7163177 | Airship ballast system An airship ballast system includes an engine driven propeller and a cooling tube that is positioned coplanar with the propeller and outside its tip path. One end of the cooling tube is connected to receive exhaust gases from the engine while the other end is connect... | 01/16/2007 |
| 7121506 | Remotely controlled model airplane having deflectable centrally biased control surface A remotely controlled model airplane includes a receiver responsive to signals from a transmitter to control the direction of flight of the model airplane. The receiver, powered by a battery, demodulates the signal transmitted by the transmitter to selectively energ... | 10/17/2006 |
| 7070145 | Tailboom-stabilized VTOL aircraft A disclosed flying craft includes a suspension structure having a first end and a second end, a lift unit, and a payload unit. The lift unit includes a nacelle and a tailboom, and pivotally couples to the first end of the suspension structure, and a payload unit cou... | 07/04/2006 |
| 7059562 | Vertical lift flying craft A disclosed vertical lift flying craft includes a lift unit that, during operation, develops a force including an upward component. A payload unit suspends from the lift unit. The payload unit suspends from the lift unit in such a way as to impart lateral stability ... | 06/13/2006 |
| 6960717 | Adjustable solar panel A nonrotating adjustable solar panel for optimizing cell charging of a portable message sign, comprising a movable frame, a message sign, a solar panel, a support post attached to the underside of the solar panel by a universal joint, and a mechanism for adjusting t... | 11/01/2005 |
| 6416015 | Anti-torque and yaw-control system for a rotary-wing aircraft A rotary-wing aircraft comprises a main rotor, a tail boom extending through an area of downwash from the main rotor, and first and second linear nozzles fixedly coupled to the tail boom. The first nozzle is adapted to discharge a sheet of fluid in a dire... | 07/09/2002 |
| 6305640 | Spring component and support bearing for helicopter tail rotors and support structure for use in outer space A spring component for support bearings of helicopter tail rotors or for support structures for use in outer space encompasses at least two contact support components (11a, 11b) for connecting with the members that are to be supported (e.g. a belt and a c... | 10/23/2001 |
| 6142413 | Device for control of an aerodynamic steering surface of a helicopter The present invention relates to a device for control of an aerodynamic steering surface (D) of a helicopter (He), which includes an anti-torque system intended to counteract the torque induced by a main forward-movement and lifting rotor (R1) and compris... | 11/07/2000 |
| 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 top of which a lifting rotor assembly and transmission are m... | 05/23/2000 |
| 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 insure that the aircraft is capable of carrying useful load... | 12/07/1999 |
| 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 a linkage member having a variable geometry, an actuator, ... | 03/04/1997 |
| 5505407 | Air-land vehicle A flying vehicle has wheels for highways, and a body and an engine. The body, engine and load define a center of mass (CG). Shrouded fans are located about the CG so as to produce, in conjunction with air jet redirection apparatus, the torques required to... | 04/09/1996 |
| 5297759 | Rotary aircraft passively stable in hover A rotary aircraft includes a cylindrically tubular hub mounting a plurality of outwardly extending, resiliently flexible blades. The blades are uniformly spaced around the hub and its central axis and fixed in pitch. Outer tips on each of the blades are d... | 03/29/1994 |
| 5289994 | Equipment carrying remote controlled aircraft It works like a helicopter in vertical flight or like an airplane in horizontal flight, being able to land accurately on a small area. It is equipped with a rotor, a couple of wings fitted with ailerons and other control surfaces actuated differentially, ... | 03/01/1994 |
| 5269654 | Tail rotor assembly for helicopters In a preferred embodiment, a tail rotor assembly for a helicopter, which includes: a first rotor disposed on a first side of the distal end of a tail boom of the helicopter and rotatable in a first geometric plane; and a second rotor disposed on a second ... | 12/14/1993 |
| 5251847 | Tail rotor anti-torque system for a helicopter An anti-torque system for a helicopter with a rearwards-elongated fuselage where an engine drives a main gearbox. The engine and the main gearbox are arranged in the central part of the fuselage. The anti-torque system includes an anti-torque tail rotor w... | 10/12/1993 |
| 5203520 | Helicar A helicar is provided which consists of a body being in the shape of an automobile, a plurality of wheels depending from the body for supporting the body on the ground, a top rotor assembly operatively secured to the body, a rear rotor assembly operativel... | 04/20/1993 |
| 5195700 | Low speed model following velocity command system for rotary wing aircraft A helicopter flight control system (21) includes a model following control system architecture which operates in a velocity command mode at low ground speeds. The control system processes information from a variety of helicopter sensors (31) in order to p... | 03/23/1993 |
| 5174523 | Compound helicopter with engine shaft power output control A compound helicopter includes a main sustaining rotor for hover and low speed flight, a propeller for providing propulsion in high speed flight and an engine. Engine output power is controlled so as to ensure efficient use of available power in both mode... | 12/29/1992 |
| 5167384 | Increasing lift on helicopter rotor blades and aircraft propellers A rotary airscrew having a central hub with coaxial first and second counter-rotating drive shafts, a first set of a plurality of non-lift blades connected to the first drive shaft for rotation to be rotated for moving air therewith, a second set of a plu... | 12/01/1992 |
| 5042747 | Vertical take-off aircraft An aircraft of any type supported by a rotor and having an auxiliary tail is provided with means that allows, at the moment of take-off, at least part of its tail to take an inclined position in relation to the position of flight. The invention is particu... | 08/27/1991 |
| 4809931 | Directional and stabilizing device having a faired and slanted antitorque rotor and a disymmetric "V" empennage, and a helicopter equipped with such a device A directional and stabilizing device is provided including a faired antitorque rotor, driven in rotation in a transverse aperture formed in a fairing slanted with respect to the vertical by an angle between 0° and 45°. It also includes a "V" empennage f... | 03/07/1989 |
| 4768737 | Helicopter control system An anti-torque system for use in a helicopter has an aft mounted horizontal fan submerged within a fuselage mounted, upward facing plenum. The fan operates off the mainpower source. The plenum has two controllable exit ports for counter torque control, fu... | 09/06/1988 |
| 4759514 | Tail rotor yaw position control for a helicopter A yaw rate stabilizer for the tail rotor of a helicopter includes a tail rotor shaft rotatably supporting a tail rotor on which rotor blades are radially mounted to develop a lift force directed substantially horizontal and transverse to the longitudinal ... | 07/26/1988 |
| 4730795 | Heliplane The basic characteristics of an airplane and of a helicopter are combined into one flying craft: a HELIPLANE. This aircraft can fly forward like an airplane and hover like a helicopter. In the hovering mode, the craft lifting force is generated by gyratin... | 03/15/1988 |
| 4529155 | Redundant tail rotor control system A flight control system for a helicopter tail rotor having a semicircular quadrant 18 with bell cranks 36, 40 mounted on either end of the quadrant and flexible control cables 20, 22 connected to each bell crank. The bell cranks are spring loaded in oppos... | 07/16/1985 |
| 4506849 | Helicopter rotor thrust ring A helicopter tail rotor (14) is provided with a thrust ring. The thrust ring comprises an annular airfoil (16) having a circular opening which is aligned coaxially with the rotor (14). The plane of the airfoil (16) is essentially parallel to the plane of ... | 03/26/1985 |
| 4493465 | Helicopter engine torque compensator The blade angle controlling pitch beam servo (26) of a helicopter tail rotor (22) is responsive to a signal manifestation (76) indicative of free turbine engine (20) gas generator speed (78) to provide torque compensation so that the helicopter airframe w... | 01/15/1985 |
| 4488851 | Power management system A power management system is disclosed for an advanced helicopter having h lift and thrust propulsion units and at least one power plant which comprises, a signal generator for generating a first signal which is proportional to the power available from t... | 12/18/1984 |
| 4347997 | Helicopters A helicopter including a power absorber arranged to selectively absorb power from a sustaining rotor system during deceleration. In an illustrated embodiment for a helicopter having a single sustaining rotor, the power absorber comprises a tail rotor asse... | 09/07/1982 |
| 4272041 | Model helicopter device A model helicopter device wherein a countertorque generated in the helicopter body by changes in the revolution of a main rotor is canceled by substantially detecting the acceleration of the revolution of the main rotor and automatically adjusting the pit... | 06/09/1981 |
| 4245801 | Tail rotor control cable-pylon fold accommodation A helicopter has main rotor blades foldable over its tail cone and a tail rotor pylon which is foldable about a tail cone vertical hinge from its fore-and-aft flight position through an angle approaching 180° to lie alongside the tail cone. Tail rotor pi... | 01/20/1981 |
