Rotary wing aircraft having collocated exhaust duct and propeller shaft

摘要

An exhaust system for reducing infrared emissions of a rotary wing aircraft includes an exhaust duct (106) having a fore end for connection with an aft turbine section of an engine of the rotary wing aircraft, the exhaust duct having an aft end having an exhaust opening (108) to expel engine exhaust proximate to a tail fairing (33) of the rotary wing aircraft; and a drive shaft (104) collocated with the exhaust duct, the drive shaft configured to provide rotational force to an aft propeller of the rotary wing aircraft.