| 摘要 |
<p>A vectorable nozzle (17) comprising a fixed first duct (21) a rotatable second duct (22) scarfed at its rear end and a rotatable third duct (23) scarfed at its front end. The second and third ducts (22, 23) are mounted in bearings (24, 26) respectively and the bearing (26) is constrained to swing bodily about trunnions (29) the axis of which lies transverse to the ducts (22, 23), and a screw jack (30) is provided to rotate the bearing (26) about the trunnions (29). The second and third ducts (22, 23) are provided with means to rotate them in opposite directions in syncronism with the rotation of the bearing (26) in the trunnion (29).</p> |
