| 摘要 |
PURPOSE:To eliminate the misalignment of a nozzle so as to simplify the attitude control thereof, by providing the nozzle so that the nozzle is oscillatable and movable in the direction of standard thrust axis with respect to an actuator for controlling the nozzle. CONSTITUTION:One end of each of at least three actuators 11 is secured to a motor chamber 1 and the other end is abutted against surfaces 19 which are formed on the periphery of a nozzle 2 in parallel to the reference thrust axis T. When the pressure in the motor chamber 1 comes up to a predetermined value after propellant is fired, the nozzle 1 moves to a position indicated by the phantom line, depressing a flexible joint 5. Then, rods 16 stop at a position where the nozzle 2 is properly aligned and held, and also, the nozzle 2 is not restricted by the actuators 11 since balls 17 are made only in rolling contact with the parallel surfaces 19, thereby no misalignment is occurred. |
