초록 ▼

A pusher turboprop engine is provided with an interior exhaust duct structure which directs the hot turbine gasses through and out of the engine nacelle to an annular duct mounted on the rear spinner which surrounds the propeller hub. The rotating annular duct includes blade-shaped shields which pro

A pusher turboprop engine is provided with an interior exhaust duct structure which directs the hot turbine gasses through and out of the engine nacelle to an annular duct mounted on the rear spinner which surrounds the propeller hub. The rotating annular duct includes blade-shaped shields which protect the roots of the propeller blades from the hot exhaust gasses and also pulls warmed cooling air through the engine nacelle thereby providing a rearwardly directed jet thrust to augment the propeller thrust.

대표청구항 ▼

A method of cooling the interior of a nacelle surrounding an aircraft turboprop engine, of the type having a rotatable propeller and spinner assembly mounted to a gearbox immediately downstream of the turbine engine, comprising the steps of: providing structure defining an annular ducted fan circums

A method of cooling the interior of a nacelle surrounding an aircraft turboprop engine, of the type having a rotatable propeller and spinner assembly mounted to a gearbox immediately downstream of the turbine engine, comprising the steps of: providing structure defining an annular ducted fan circumscribing a portion of said spinner assembly, said portion including the propeller blades, and configuring said ducted fan to contain a plurality of hollow, aerodynamic fan blade members surrounding the root of each propeller blade; aligning said ducted fan with the open aft end of said nacelle; and rotating said ducted fan structure in unison with said propeller to assist the flow of cooling air through said engine nacelle.