Convergent-divergent thrust jet for jet propulsion - has divergent angle adjustable independent of jet cross section

摘要

The thrust jet has twelve main adjuster segments and twelve auxiliary adjuster segments intermeshing with them. The jet adjuster segments together with their actuating mechanism are enclosed by a surrounding rim of overlapping jet casing flaps (19) patent 2617677. Both main adjuster segments and auxiliary segments are respectively sub-divided into upstream and downstream sections by pivot hinges (21) to permit the divergence angle to be selected. The main adjuster segments are displaced axially by a connecting ring (24). The ring is displaced axially by a screw spindle drive (25). The jet segments move by rollers (13, 14) in curved guide paths (28). The upstream situated roller (13) strikes a stop (41) at the end of the curved path (15) to terminate a first axial displacement when the jet has reached its maximum cross section. A further displacement of the connector ring causes the other rollers (27) to move along their curved paths (28) to the divergent angle.