An assembly is provided for a rotorcraft. This rotorcraft assembly includes a fuselage, a tail and a rotorcraft lift system. The tail boom is connected to and projects longitudinally out from the fuselage. The rotorcraft lift system includes a rotorcraft rotor and a powerplant configured to drive rotation of the rotorcraft rotor to generate rotorcraft lift. The powerplant includes a heat engine and a powerplant flowpath. The powerplant flowpath extends through the heat engine. The outlet from the powerplant flowpath is fluidly coupled to an interior volume in the tail boom.

An aircraft tail jet anti-stall system may have an engine capable of producing thrust to an aircraft, the engine located in an aircraft tail. The system may have a diverter connected to the engine to receive exhaust thrust from the engine, the diverter configured to direct the exhaust thrust received from the engine in one of three different directions, the first direction being upwardly relative to the aircraft tail to provide a nose-up thrust to the aircraft for a nose-pitch up maneuver, the second direction being rearward relative to the aircraft tail, and the third direction being downward relative to the aircraft tail to provide a nose-down thrust to the aircraft for a nose pitch-down maneuver.