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US4777795A Device for varying the thrust of a propulsion system using a solid propellant 失效
用于改变使用固体推进剂的推进系统的推力的装置

Device for varying the thrust of a propulsion system using a solid
propellant
摘要:
The device comprises, at the outlet of the combustion chamber 3, a movable assembly comprising a hollow closure member 26 constituting a needle 27, a thermal shield 22 and an annular piston 14. This closure member acts as a piston under the effect of the pressure of the gases and drives the annular piston so as to expel a hydraulic fluid from a jack chamber 33 having an adjustable outlet 34. The closure member 26 defines a chamber 28 for calming the gases.
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