Propelling nozzle

A propelling nozzle creating a nozzle flow and having a nozzle contour with a variable course for a turboramjet engine of a flight aggregate operable in a subsonic, supersonic and hypersonic range, the propelling nozzle comprising:

• a four-cornered nozzle housing having lateral wall sections;
• upper primary and secondary flaps;
• lower primary and secondary flaps, said upper and lower primary and secondary flaps being disposed opposite one another at a mutual distance and being sealingly and movably guided between the lateral wall section of said four-cornered nozzle housing, said upper and lower primary flaps being pivotally arranged about a fixed axis of rotation on said nozzle housing;
• first levers non-rotatably connected with said upper and lower primary flaps, said upper and lower secondary flaps being pivotally linked at an upstream end to said first levers via first pivots on the side away from the nozzle flow;
• wherein said upper and lower secondary flaps transition into said upper and lower primary flaps at a surface section bent concentrically with respect to said first pivots;
• wherein the turboramjet engine has a jet pipe and the flight aggregate has a radially exterior expansion ramp, said propelling nozzle being arranged between said jet pipe and the expansion ramp;
• wherein said upper and lower primary and secondary flaps are arranged in said four-cornered nozzle housing in a closed manner forming a pressure housing;
• wherein said upper and lower secondary flaps are arranged on said nozzle housing at their downstream ends to be axially movable and angularly adjustable;
• wherein said first levers are formed on interior sections bent away from said primary flaps in a toggle-lever manner and have cut-outs concentric with respect to said first pivots allowing said surface sections to be moved into said cut-outs;
• and
• adjusting systems, each of said adjusting systems being arranged between one of an upper and lower wall portion of said nozzle housing and said upper and lower flaps, respectively, and acting upon one of said upper and lower primary and secondary flaps to pivot said flaps.