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US 5,292,069 AGranted
Convertible plug nozzle
AssigneeUnited Technologies Corporation
InventorEdward B. Thayer
Life of this patent
Estimating the term…
Abstract
A plug nozzle is convertible to and from an open nozzle by moving several components. The convergent flap moves between an outboard convergent flap position and a central plug position. Divergent flaps, hinged to the convergent flaps, move between the outboard divergent flap position and a central contacting position within the plug. Plug surface flaps are moved to the inboard position where they form the plug surface from an outboard position.
Claims9
A convertible plug nozzle for discharging a gas stream form an aircraft gas turbine engine comprising:
- a fixed exhaust collar having an internal passage for conducting the gas stream therethrough;
- a pair of convergent flaps aft of said collar, moveable from an outboard convergent flap position to a central plug position with said pair of convergent flaps in contact with each other at said central plug position;
- a pair of divergent flaps hinged to the aft end of said convergent flaps, moveable from an outboard divergent flap position to a central plug position where said divergent flaps are substantially in contact with each other;
- a pair of plug surface flaps moveable from an external position outboard of said divergent flaps in the outboard divergent flap position, to an inboard position in contact with said convergent flaps at the forward end and forming an aftwardly tapering plug surface;
- and
- two external shrouds, each forming an outboard surface of a flow path between one of said plug surface flaps and a corresponding one of said external shrouds.
3 more elements
Dependencies are inferred from the claim text.