Abstract: A system and method for controlling clearance between tips of moving blades of an aeroplane gas-turbine engine and a turbine shroud of an outer casing surrounding the blades. The method includes controlling, according to an operating speed of the engine, a valve positioned in an air duct opening at a stage of the compressor of the engine and leading into a control housing positioned around the outer surface of the turbine shroud and supplied with air coming only from the compressor stage. The valve is opened to cool the turbine shroud during a high-speed phase corresponding to takeoff and climb phases of an aeroplane propelled by the engine and during a nominal-speed phase following the high-speed phase and corresponding to a cruise phase of the aeroplane.

Abstract: A turbojet thrust reverser includes two doors each displaceable between an open position and a closed position of the reverser by at least one respective control actuator. Two electric motors drive the control actuators for the doors; each motor being controlled by an electronic control unit connected to a full authority digital engine control. Two servo-control devices control the displacement of the doors as a function of determined position references. The servo-control devices enable the doors to be displaced synchronously as a function of any variation in the forces exerted on the reverser and as a function of any force difference between the two doors.

Abstract: A turbojet thrust reverser has two doors that are displaceable between a reverser open position and a reverser closed position, each door being controlled by a respective electronic control unit connected to a FADEC, and each door having a respective locking device for locking the position of the door associated therewith. Each locking device can be unlocked solely on receiving orders that come simultaneously from both electronic control units.

Abstract: Each manual control unit for a moving part of a thrust reverser is associated with a maintenance plate that is pivotable between at least two positions: a first or “normal operation” position in which said plate prevents the manual control unit with which it is associated from being driven manually, while allowing it to be driven electrically; and a second or “maintenance” position in which said plate allows the manual control unit with which it is associated to be driven manually while preventing it from being driven electrically.

Abstract: A turbojet thrust reverser includes two doors each controlled by a respective electronic control unit, at least one sensor per door measuring at least one item of position data concerning the door, at least one sensor of each door being connected to the electronic control unit controlling that door, the electronic control units being connected to each other in order to exchange the position data, a FADEC having two channels each connected to both electronic control units in order to receive from each of the electronic control units data concerning the positions of each of the doors and data concerning the operating state of each of the electronic control units, the channels being connected to each other in order to exchange the door position data and the electronic control unit state data so that the airplane pilot is continuously informed about the positions of the doors and the states of the electronic units, even in the event of a breakdown in one of the electronic units and in one of the FADEC channels.

Abstract: A turbojet thrust reverser comprising two doors each displaceable between an open position and a closed position of the reverser by means of at least one respective control actuator; two electric motors each driving said at least one control actuator for each door; each motor being controlled by an electronic control unit connected to a full authority digital engine control; and two servo-control means for controlling the displacement of corresponding ones of said doors as a function of determined position references, said servo-control means enabling said doors to be displaced synchronously as a function of any variation in the forces exerted on the reverser and as a function of any force difference between the two doors.

Abstract: A turbojet thrust reverser has two doors that are displaceable between a reverser open position and a reverser closed position, each door being controlled by a respective electronic control unit connected to a FADEC, and each door having a respective locking device for locking the position of the door associated therewith. Each locking device can be unlocked solely on receiving orders that come simultaneously from both electronic control units.

Abstract: Each manual control unit for a moving part of a thrust reverser is associated with a maintenance plate that is pivotable between at least two positions: a first or “normal operation” position in which said plate prevents the manual control unit with which it is associated from being driven manually, while allowing it to be driven electrically; and a second or “maintenance” position in which said plate allows the manual control unit with which it is associated to be driven manually while preventing it from being driven electrically.

Abstract: A turbojet thrust reverser comprises two doors each controlled by a respective electronic control unit, and at least one sensor per door measuring at least one item of position data concerning said door, said at least one sensor of each door being connected to said electronic control unit controlling that door, said electronic control units being connected to each other in order to exchange said position data, and a FADEC having two channels each connected to both electronic control units in order to receive from each of said electronic control units data concerning the positions of each of said doors and data concerning the operating state of each of said electronic control units, said channels being connected to each other in order to exchange said door position data and said electronic control unit state data so that the airplane pilot is continuously informed about the positions of said doors and the states of said electronic units, even in the event of a breakdown in one of said electronic units and in o