Patent ID: 6854260

Claim:
In a nozzle for a jet engine enclosed within a tubular housing and also having an existing first stage mixer within said housing which includes a number of first stage lobes, and having a thrust reverser having a stowed position fixed relative to the tubular housing and having a deployed position, the improvement comprising a second stage mixer coupled to the exhaust aperture of said tubular housing to receive gas exhausted from the first stage mixer, said second stage mixer having a plurality of identically formed lobes which equal in number those of the first stage lobes; the second stage mixer being unenclosed by a housing and having an exterior in contact with the ambient air to allow the air to enter the mixer and mix with the gas from the first stare mixer; the second stage mixer having a trailing edge forming the exit terminus for the gas flow; and said thrust reverser in the deployed position being positioned downstream of the exit terminus to reverse the gas flow.