Several model jet deflectors (devices which change the direction of resultant jet thrust) were tested in quiescent air to determine the effects of design variables on their performance and operating charac¬teristics. The deflectors (swivelled nozzles, auxiliary nozzles, and mechanical deflectors) were designed to be adaptable to convergent-nozzle, plug-nozzle, and ejector turbojet exhaust systems.nSide force as high as 43 percent of the undeflected jet thrust was obtained, and, in general, the axial thrust was reduced to not less than 81 percent of the undeflected jet thrust. Analytical expressions relat¬ing the performance of each type deflector with significant design vari¬ables are also presented.
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