Abstract: A turboprop engine includes a power jet mounted coaxially to the engine axis (X-X?), and has a fan case and a gas ejecting system provided with two afterbody half-cowlings (10b) each of which is pivotable around an axis (A2) between open and closed positions, wherein the half-cowlings are connected to the downstream of the fan case through a ‘V-blade/V-groove’ system. In a first embodiment, the pivot axes (A2) make an angle ?>3° to the engine axis (X, X?) and a joint plane (Z2-Z2) between the afterbody half-cowlings and the downstream of the fan case makes to the plane (Y, Y?) perpendicular to the engine axis (X, X?) an angle ? in such a way that the difference between the angle ? and the angle ? is less than or equal to 3°. In the other embodiment, the axes are converged to each other in a downstream direction.

Abstract: A turboprop engine includes a power jet mounted coaxially to the engine axis (X-X?), and has a fan case and a gas ejecting system provided with two afterbody half-cowlings (10b) each of which is pivotable around an axis (A2) between open and closed positions, wherein the half-cowlings are connected to the downstream of the fan case through a ‘V-blade/V-groove’ system. In a first embodiment, the pivot axes (A2) make an angle ?>3° to the engine axis (X, X?) and a joint plane (Z2-Z2) between the afterbody half-cowlings and the downstream of the fan case makes to the plane (Y, Y?) perpendicular to the engine axis (X, X?) an angle ? in such a way that the difference between the angle ? and the angle ? is less than or equal to 3°. In the other embodiment, the axes are converged to each other in a downstream direction.

Abstract: The invention concerns a backblast gas structure for jet engine comprising a thrust reversal system with two downstream doors. The invention is characterized in that the two tilt-up doors articulated about axes (6, 7) are mounted on two side beams (2, 3) with free downstream edges (16, 17) comprising protuberances (18, 19). The door downstream edges (13, 14) having median zones (13b, 14b) forming an angle (A) with the lateral parts (13a, 14a), such that when the doors are in retracted position in direct jet, the beam (13b, 14b) edges (16, 17) of the doors are found in the same plane (P2), thereby constituting a gas exhaust outlet which is planar and substantially circular. The invention aims at improving the power package performance in direct jet.

Abstract: An improvement made to jet-engine thrust reversers and, more particularly, to reversers called tilting-door reversers. The doors are equipped, on their upstream portion, with a flow-deflecting overlay 90 which, in the open-door position, is in a position close to a line PM parallel to the axis of the engine 1, the overlay making with the inner door skin an angle B greater than 90.degree., preferably between 105.degree. and 110.degree.. The invention is more particularly applicable to dual-flow engines.

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.

Abstract: Thrust reverser for a jet engine of the type with doors equipped with auxiliary flaps. The invention relates to thrust reversers with doors 13 having a front deflector 15. The door is equipped, on its inner face, with one or two auxiliary flaps 16 articulated about axles 17 and controlled by a lever 21 articulated on the door at 22 and stressed into a retracted flap position by means of a spring 24. At the end of closure of the door, the end 31 of the lever interacts with a stop 33 which ensures that the lever tilts and that the flap 16 moves away from the door 13.