JET PROPULSION NOZZLE

A variable area and reversing propulsion nozzle arrangement includes first and second sets of opposed valves or "eyelids" rotatable towards each other to reduce the area of the outlet of a jet pipe, the two sets of valves being rotatable about crossed axes. Reverse thrust outlets are disposed in the wall of the jet pipe between the axes of valve rotation, these including rotatable vane cascades which may close the outlets or direct the flow forwardly. The thrust reversing cascades and the area varying valves are coupled to common actuators, the arrangement being such that the reversing cascades begin to open only after the propulsion nozzle is partly closed.