Abstract: A variable turbofan bypass cowling includes a movable cowling assembly (12) with pivoting door type thrust reversers (20) connected to a fixed upstream cowling structure (11). The movable assembly may be translated between an upstream position whereat an upstream portion of the reverser and cowling assembly (12) is housed inside an enclosure formed by the upstream cowling structure (11) and a downstream position whereat the assembly (12) effects a variation in the exhaust duct (17) cross-section between an inner primary turbojet-engine cowling (15) and a radially inner wall of the assembly (12). The reverser doors (20) in their closed position are integrated into the cowling wall and contain at least part of the exhaust flow. When pivoted to thrust reversed positions following translation of the assembly (12) to a downstream rearward position, thrust reversal is provided in the usual manner.

Abstract: A thrust reverser is disclosed for a turbojet engine having a cowling forming an outer boundary for a gas flow duct, the cowling having at least one reverse thrust opening communicating with the gas flow duct. The thrust reverser includes a thrust reverser door pivotally attached to the cowling so as to move between a forward thrust position, in which the reverse thrust opening is uncovered and the thrust reverser door covers the reverse thrust opening, and a reverse thrust position in which the thrust reverser door directs at least a portion of the gas flow from the duct through the reverse thrust opening. A panel is incorporated into the thrust reverser such that it is movable between a first position in which an inner surface of the panel forms a portion of the outer boundary of the gas flow duct and a second position wherein the entire panel is located within the gas flow duct.