U.S. Patent Specifications

Abstract

In a jet engine having an elongate tailpipe; an open end in said tailpipe for permitting combusted gases to flow axially of said tailpipe and exhaust to the atmosphere; a pair of coaxial members mounted for opposite movement with respect to said tailpipe defining a variable area exhaust orifice and each having an area exposed to the axially flowing combusted gases; and an actuating mechanism for imparting simultaneous opposite movements to said members so related to the areas of said members that the axial gas loads on one member are substantally nullified by the axial gas loads on the other member whereby said members can be rapidly selectively moved with a minimum of effort to vary the area of said orifice for various operating conditions.

Citation

(1958), "U.S. Patent Specifications", Aircraft Engineering and Aerospace Technology, Vol. 30 No. 2, pp. 61-61. https://doi.org/10.1108/eb032936