Abstract: The invention relates to a combustion gas discharge nozzle for a rocket engine including a stationary part and a moving part extending from the stationary part, the moving part made using flaps positioned downstream from the stationary part and forming an extension of the nozzle, the nozzle including a sealing device extending between the fixed part and the moving part in the form of a flexible membrane withstanding a local temperature of the combustion gases at the nozzle outlet and connecting the end of the stationary part to a border of the flaps or petals forming the moving part, the flexible membrane forming an annular tubing, the sealing device being provided with a duct for injecting gas at the flexible membrane between the stationary part and the moving part extending the nozzle.

Abstract: The invention relates to a propulsion unit for a reusable launch vehicle including a rocket engine supported by a cradle. According to the invention, the cradle includes at least three attachment elements for assembling the unit on the structure of the vehicle to which the unit is to be connected, the at least three attachment elements defining a plane for removing the unit, and in which the unit includes one or more fluid and/or electric links of the engine, each one of the links including a free end to be assembled with a corresponding circuit for supplying the vehicle, to which the unit is to be connected, the tip of at least some of the free ends being contained in the removal plane.

Abstract: The invention relates to a propulsion unit for a reusable launch vehicle including a rocket engine supported by a cradle. According to the invention, the cradle includes at least three attachment elements for assembling the unit on the structure of the vehicle to which the unit is to be connected, the at least three attachment elements defining a plane for removing the unit, and in which the unit includes one or more fluid and/or electric links of the engine, each one of the links including a free end to be assembled with a corresponding circuit for supplying the vehicle, to which the unit is to be connected, the tip of at least some of the free ends being contained in the removal plane.

Abstract: The invention relates to a combustion gas discharge nozzle for a rocket engine including a stationary part and a moving part, extending the stationary part, the moving part, made using flaps, being positioned downstream from the stationary part and forming an extension of the nozzle, the nozzle including a sealing device between the fixed part and the moving part in the form of a flexible membrane withstanding a local temperature of the combustion gases at the nozzle outlet and connecting the end of the stationary part to a border of the flaps or petals forming the moving part, the flexible membrane forming an annular tubing, the device being provided with means for injecting gas at the flexible membrane between the stationary part and the moving part extending the nozzle.

Abstract: The subject of the invention is a device for starting a turbopump of a rocket motor of an aircraft including a turbine engine for propelling the aircraft and a rocket motor, which includes a pneumatic supply of compressed air to a turbine of the turbopump, this compressed air being tapped from a tapping on a compressor stage of the aircraft propulsion turbine engine upstream of the combustion chamber of the turbine engine. It applies notably to an aircraft of the space airplane type.