Axisymmetric vectoring exhaust nozzle seal

Fluid sprinkling – spraying – and diffusing – Reaction motor discharge nozzle – With means controlling amount – shape or direction of...

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23926533, 60228, 60271, B64C 1502

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active

050390147

ABSTRACT:
An interflap segmented seal is provided for use between adjacent flaps of an axisymmetric vectorable exhaust nozzle in order to minimize flow loss therebetween when the flaps are pivoted through different angles in order to turn the exhaust flow and vector the thrust. The overlapping seal segments are mounted to a backbone having an elliptical cross-section by a flange with a lobed hole in it through which the backbone passes. Spacers between the flanges axially position the individual segments from each other. Variable movement between adjacent flaps produces different angles between the sealing edges of the flaps which are often skewed with respect to each other and the flexibility afforded by the seals of the present invention allows the seals to minimize the leakage between the flaps and the seals.

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Popular Science, Feb., 1989, X-31 Fighter, Thrust Vectoring of Pitch and Yaw Plane by Deflection of Exhaust, X-31A Aircraft pp. 58-64.
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