Abstract: A thrust reverser for a turbofan-type turbojet engine in which the axial length of the fan housing is less than that of the turbojet engine cowling such that the movable thrust reverser baffles may be attached to the jet engine cowling and moved to an extended position wherein the cold flow gases emanating from the cold flow exhaust duct are redirected to provide a thrust reversing force. The baffles are movably attached to the engine cowling by a plurality of linkrods forming a deformable parallelogram kinematic linkage. Each of the linkrods has opposite ends pivotally attached to the movable baffle and to the engine cowling, respectively.

Abstract: A thrust reverser is disclosed for a turbojet engine having a nacelle with a plurality of beams extending rearwardly from a rear portion of the nacelle on which are pivotally mounted thrust reverser baffles movable between forward thrust positions and reverse thrust positions. The thrust reverser baffles have forward edges, rear edges forming a portion of an exhaust nozzle when the baffles are in their forward thrust positions, outer baffle surfaces substantially flush with the outer surface of the nacelle when the baffles are in their forward thrust positions, and inner baffle surfaces forming a portion of a gas flow duct when the baffles are in their forward thrust positions, such that the exhaust nozzle has a width H measured in a direction parallel to the width of the beam h such that h is equal or greater than 0.6 H.

Abstract: The present invention relates to a thrust reverser for a turbojet engine having at least one thrust reverser door pivotally attached to a cowling so as to pivot about a first pivot axis between a forward thrust position, wherein the thrust reverser door closes a thrust reverse opening in the cowling, and a reverse thrust position in which the thrust reverse opening is opened. The thrust reverser door moves from the forward thrust position to the reverse thrust position about its pivot axis in a first pivot direction. The invention also includes a thrust reverser panel pivotally attached to the cowling so as to pivot about a second pivot axis between a forward thrust position and a reverse thrust position. In pivoting from the forward thrust position to the reverse thrust position, the thrust reverser panel pivots in a second direction about its axis, the pivoting direction of the thrust reverser panel being opposite to the pivoting direction of the thrust reverser door.

Abstract: A thrust reverser is disclosed for a turbofan-type turbojet engine having a cowling bounding a gas flow duct in which the thrust reverser has a plurality of thrust reverser doors each pivotally attached to the cowling so as to be movable between a forward thrust position and a reverse thrust position which redirects the gases passing through the gas flow duct outwardly from the cowling to produce a reverse thrust. At least one of the plurality of thrust reverser doors having a width, measured in a generally circumferential direction around the cowling, less than a corresponding width of at least one of the other thrust reverser doors.

Abstract: A thrust reverser for a turbofan-type turbojet engine is disclosed having an inner housing with a rear, downstream edge, a fan cowling extending around a portion of the inner housing so as to define a bypass gas flow duct, the fan cowling having a rear edge portion disposed forwardly of the rear edge of the housing. The thrust reverser also includes a thrust reverser flap assembly having a carriage slidably connected to the rear edge portion of the fan cowling so as to move in an axial direction between first and second positions, a thrust reverser flap having a rear flap edge disposed forwardly of the rear edge of the inner housing and pivotally attached to the carriage, and a link rod pivotally connected to the thrust reverser flap and to a stationary structure such as the inner housing.

Abstract: For the purpose of taking measurements within a V-engine while it is running during development of the engine, a first of the two banks of piston and cylinders defining the V is provided with measurement sensors and is arranged to run normally performing the normal cycle of induction, compression, combustion, and exhaust, and each cylinder of the second bank has its fuel inlet closed and its combustion chamber open to the atmosphere whereby the second bank functions without compression and combustion and is effectively inert, the second bank serving as a mechanical support for conveying signals from the measurement sensors.

Abstract: Protective shield (9) for a turbo-engine external fairing (3). It comprises a ring made of a ductile material retained by several fastening means relatively easy to break. When a rotor portion (17) accidentally detached strikes it, it dents it breaking some or all of its fasteners. By means of this possibility allowing for wide deformations of the shield (9), the capacity for absorbing energy is significant.

Abstract: A thrust reverser for a fan-type turbojet engine is disclosed for use in a turbojet engine structure having an engine housing defining a primary gas flow duct and a fan housing generally coaxially arranged about the jet engine housing and defining therebetween a generally annular secondary gas flow duct. The thrust reverser has at least one thrust reverser door attached to the fan housing by a forward linkrod pivotally attached to a forward portion of the thrust reverser door and pivotally attached to the fan housing, and a rear linkrod pivotally attached to a rear portion of the thrust reverser door and also pivotally attached to the engine housing. The linkrod attaching mechanism enables the thrust reverser door to be movable between a forward thrust position wherein the door outer surface is substantially flush with an outer surface of the fan housing and a reverse thrust position wherein the thrust reverser door redirects the gases flowing through the secondary gas flow duct to provide a reverse thrust.

Abstract: A load distributing planetary gear or epicyclic transmission having a sun gear, an annulus gear and a planet wheel carrier supporting a plurality of planet wheels, all of the gears being helical and the planet wheels being simultaneously meshed with the sun gear and the annulus gear. Each planet wheel is mounted on a distal end of a flexible shaft, which is supported by the planet wheel carrier on an opposite end, by a journal which permits swivelling of the planet wheel. Each planet wheel is held in place by a component which is capable of sliding only in a plane extending substantially perpendicular to a plane passing through the axis of rotation of the planet wheel and the axis of rotation of the sun gear. The sliding component is offset axially along these axes relative to the planet wheel, preferably being located on the side of the planet wheel facing towards the planet wheel carrier.

Abstract: A thrust reverser for a turbojet engine is disclosed in which the actuator for the thrust reverser is attached to a second support frame located downstream of the reverse thrust opening. A plurality of longitudinally extending beams interconnect the downstream support frame to an upstream support frame which is located upstream of the reverse thrust opening. A cylinder of the actuating device is attached to the downstream support frame and the extendible and retractable piston rod is attached to the moveable thrust reverser element. The location of the actuating device allows for a better stress distribution and enables the weight to be reduced as compared to prior art thrust reversers.

Abstract: A device for the transmission of electrical power signals of variable frequencies and phases from a stationary assembly to a rotary assembly wherein the primary winding of a rotary transformer is supplied by an electrical power source of fixed frequency, and the power output from the secondary winding of the transformer is supplied to a chopping feed of a signal generating system including a digital memory storing a digital signal having the desired characteristics of the signal to be generated, a digital-to-analogue converter for receiving the digital signal from the memory under the control of a clock pulse generator, and an amplifier connected to the converter to give the desired power to the analogue signal received from the converter.

Abstract: A method of manufacturing an assembly composed of two shaped and bonded parts in which the two parts to be shaped and bonded are placed on a header and die of a press, an adhesive is applied to at least one of the facing surfaces of the parts, the space between the header and the die is pressurized so that the parts are hot-formed to the shapes of the header and the die, and the header and die are then moved towards each other to press and bond the parts together.

Abstract: A method for inspecting and ascertaining the quality of a cast workpiece for the dimensional quality control is used for cast workpieces in which both the rough, as cast workpiece, as well as the finished cast workpiece are initially described in a computer file of a computer aided drafting (CAD)system.

Abstract: A thrust reverser for a turbofan-type turbojet engine assembly is disclosed having a deflector defining an upstream edge of a reverse thrust opening formed in the turbofan housing so as to control the direction and shape of the gases passing through the reverse thrust opening. The deflector has a deflector edge portion defining a deflector edge wherein the curvature of the deflector edge portion, as measured in a longitudinal radial plane passing radially through a longitudinal axis of the engine, varies in a direction from one side of the reverse thrust opening to the opposite side of the opening. The curvature of the deflector edge portion is defined as being positive when the center of curvature of the deflector edge portion lies radially outwardly of the deflector and is defined as being negative when the center of curvature of the deflector edge portion lies radially inwardly of the deflector.

Abstract: A thrust reverser for a turbojet engine is disclosed having a movable component, such as a thrust reverser door, operatively associated with an engine housing, and vanes formed on the upstream edge portion of the movable component and extending inwardly from an interior surface. The vanes, which extend in a direction generally parallel to a longitudinal axis of the engine, are located in an array which extends across the upstream edge portion of the movable component from one side to the other. The vanes each may be generally triangular in configuration and have one side attached to the inner surface of the movable component and another side attached to a gas flow deflector extending laterally across the front edge of the movable component.

Abstract: A thrust reverser for a turbofan engine is disclosed in which the pressure of the gases passing through the cold flow air duct act on a downstream segment of the thrust reverser door so that the door is normally biased toward its closed, forward thrust position. This positively eliminates any possibility of the thrust reverser door inadvertently opening into its reverse thrust position. The thrust reverser according to the present invention is thus self-closing regardless of the position and/or functioning of the typical closing and locking mechanisms. The thrust reverser door assembly has internal and external doors separately pivotally attached to the turbofan housing so as to each be movable between closed, forward thrust positions, and opened, reverse thrust positions. A single actuating mechanism may be utilized to move both of the internal and external doors between their respective closed and opened positions.

Abstract: A thrust reverser door for a turbofan-type turobjet engine thrust reversing system is disclosed defining a gas flow passage between inner and outer panels of the door. The passae has an inlet formed through the inner panel of the thrust reverser door and an outlet, directs a portion of the gas flowing through a cold flow air duct in a forward direction. The gas flowing in the forward direction inpinges upon gases flowing through a laterally facing opening in the housing in order to provide a forward component to this gas flow. A moveable flap may be attached to the thrust reverser door in order to cover the inlet to the passageway when the device is operated in the forward thrust mode.