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The S5.142 (AKA DST-25) is a liquid pressure-fed rocket engine burning N2O4/UDMH with an O/F of 1.85.〔 It is used for crew-rated spacecraft propulsion applications.〔 It is currently used in the Soyuz-TMA-M spacecraft propulsion module KTDU-80, as the low thrust thruster (DPO-M).〔 The S5.142 generates of thrust with a chamber pressure of and a nozzle expansion of 45 that enables it to achieve a specific impulse of .〔 It is rated for 300,000 starts with a total firing time of 25,000 seconds and can do single burns from 0.03seconds to 4,000 seconds. Each unit weights .〔〔 ==Versions== This engine has been used in manned Russian space program since the Soyuz TM-23.〔 The are two versions:〔 * S5.142 (AKA DST-25): Version used as DPO-M (attitude control thrusters) on the KTDU-80 unit of the Soyuz-TM and later.〔 * S5.142A: A version of the S5.142 adapted for the KVTK upper stage for the Angara rocket.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「S5.142」の詳細全文を読む スポンサード リンク
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