| 摘要 |
<p>A pyrotechnically driven device for restricting the area of the nozzle throat (16) in a solid propellant rocket motor includes a piston support (22) mounted in the rocket motor exit cone (14). Attached to a piston (34) is a restrictor (54) movable from a retracted position outside of the nozzle throat (16) to a restricting position within the nozzle throat (16). The piston (34) and attached restrictor (54) are driven by a pyrotechnic charge (30) which includes an initiator (32) operable independently from the solid propellant of the rocket motor. A locking means (44, 48) locks the restrictor in its restricting position.</p> |
