Aft exhaust system for rotary wing aircraft

An exhaust system (100, 150, 170) for reducing infrared emissions of a rotary wing aircraft (10) includes a duct assembly having an inlet portion (102, 152, 172) and an outlet portion (104, 154, 174); the inlet portion configured to receive exhaust from an engine (E) of the aircraft; and the outlet portion coupled to the inlet portion, the outlet portion having an outlet duct (124, 156, 178) with an outlet opening (126, 158, 180), the outlet duct configured expel an emission containing engine exhaust proximate to a tail fairing (33) of the rotary wing aircraft.