Jet propulsion efflux outlets

Claim 1

A jet propulsion efflux outlet assembly for controlling a guided flight vehicle in opposed senses about at least its roll axis while in flight comprising in combination; nozzle means defining a plurality of aperture means through which efflux issues to exert a propulsive thurst, the plurality of aperture means being symmetrically disposed about the roll axis and shaped so that at least one edge region of each aperture means is radially spaced further from the roll axis than other edge regions of the same aperture means; a spoiler plate member defining a plurality of aperture means matching in both number and configuration said plurality of aperture means of said nozzle means, each aperture means of said spoiler plate member having an impingement region on which the issuing efflux can impinge; support means for supporting said spoiler plate member in a position generally transverse to the roll axis adjacent but downstream of said nozzle means and allowing movement of said spoiler plate member in the form of rotation in the roll sense; and actuating means operable in flight to turn said spoiler plate member in opposed roll senses, such that efflux issuing from a part of each aperture means remote from the roll axis impinges on an associated impingement region and causes a roll torque of magnitude and sense dependent on the respective magnitude and sense of movement of said spoiler plate member.