| 摘要 |
A gas turbine powerplant includes an attitude control nozzle comprising an aperture in a duct wall of the powerplant for discharging a propulsive stream from the powerplant. One or more flaps are each pivoted to the side edges of the aperture and pivotally movable into different positions relative to the duct. In one position the flaps co-operate to close the aperture and in further positions the free ends of the flap or flaps co-operate to define variously directed discharge orifices of variable area.
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