| 摘要 |
<p>A rocket motor is disclosed having an annular jet nozzle (102), via which efflux gas leaves a combustion chamber (101). The annular nozzle is defined between a back plate (104) and a casing (106). The casing (106) and back plete (104) are interconnected by pillars (133) around which propellant charges (132) are mounted. Shims (130) control the concentricity of the back plate (104) and the casing (106). Fins (131), against which efflux gas from the nozzle impinges, spin the rocket motor in flight.</p> |
