British Patent Abridgements

Abstract

A jet propulsion engine comprises a downstream element separate from but normally forming a continuation of the housing defining a jet pipe, so that the upstream end of the element is spaced outwardly of and overlaps the downstream end of the pipe to form therewith an annular space, and blocking means normally housed in the said space, wherein the downstream element is movable axially to open a gap between itself and the housing and to permit the blocking means to be moved to a position directing the jet stream through the gap. The apparatus is shown in jet deflecting disposition, in which the silencing nozzle 14 has been moved downstream, so that the nozzle wall 10 is separated from a skirt 91 on the jet pipe, and a nozzle fairing skirt 15 is separated from the housing 9. The blocking means comprises clam shell elements 2 pivoted on a transverse axis 20 and noted at 21 to fit on to a tail cone 80. To revert to the normal disposition, the shell elements 2 are swung by actuators 24 to lie outside the skirt 91, and the nozzle 14 is retracted by actuator 31, being slidably mounted by beams 3 and guides 30 (one shown). The shells then lie between skirts 15 and 91. The actuators 24 and 31 or their controls may be interconnected.

Citation

(1961), "British Patent Abridgements", Aircraft Engineering and Aerospace Technology, Vol. 33 No. 1, pp. 32-32. https://doi.org/10.1108/eb033368