초록 ▼

A ducted fan propulsion plant has a reversible-pitch fan driven by a core gas turbine engine and housed in a duct which terminates at its downstream end in an outlet nozzle defined between two semi-cylindrical shells. The shells are mounted for movement hydraulically both axially and angularly to de

A ducted fan propulsion plant has a reversible-pitch fan driven by a core gas turbine engine and housed in a duct which terminates at its downstream end in an outlet nozzle defined between two semi-cylindrical shells. The shells are mounted for movement hydraulically both axially and angularly to define an increased effective nozzle area for take-off. Upon further rearward axial displacement the shells adopt a reverse-thrust position to define air inlets to the fan when the fan blade pitch is reversed.

대표청구항 ▼

A gas turbine powerplant for aircraft propulsion comprising, a flow duct for propulsive fluid, an exhaust nozzle connected to the downstream end of said duct, a first axis being a common longitudinal axis of said duct and said nozzle, said nozzle comprising two substantially semi-cylindrical shells

A gas turbine powerplant for aircraft propulsion comprising, a flow duct for propulsive fluid, an exhaust nozzle connected to the downstream end of said duct, a first axis being a common longitudinal axis of said duct and said nozzle, said nozzle comprising two substantially semi-cylindrical shells each having two longitudinal edges lying in a common plane, the longitudinal edges of the one shell confronting the corresponding edges of the other shell, fixed structure adjacent to said edges, guide means connecting said shells at said edges, at locations spaced apart therealong, to said fixed structure and cooperating to guide said shells for angular motion about respective second axes extending at the periphery of said shells tangentially thereto, and operating means for imparting said angular motion to said shells.