Editing Propelling nozzle (section)

===Other applications===
[[File:Avgasrekylator saxofon.png|thumb|right|Sketch showing rearward-discharge of gas from exhaust manifold.]]
Certain aircraft, like the German Bf 109 and the Macchi C.202/205 were fitted with "ejector-type exhausts". These exhausts converted some of the waste energy of the (internal combustion) engines exhaust-flow into a small amount of forward thrust by accelerating the hot gasses in a rearward direction to a speed greater than that of the aircraft. All exhaust configurations do this to some extent if the exhaust gasses are discharged in a rearward direction.

A particular thrust-producing exhaust device was patented by [[Rolls-Royce Limited]] in 1937.<ref>{{Cite web|url=https://patents.google.com/patent/US2192730|title = Exhaust pipe for internal combustion engines of aircraft}}</ref> On the 1944 [[de Havilland Hornet]]'s [[Rolls-Royce Merlin|Rolls-Royce Merlin 130/131]] engines the thrust from the multi-ejector exhausts were equivalent to an extra 70bhp per-engine at full-throttle height.