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- Q20744150 subject Q20829258.
- Q20744150 subject Q21412544.
- Q20744150 subject Q7020479.
- Q20744150 subject Q7142278.
- Q20744150 abstract "The S5.4 (AKA TDU-1, GRAU Index 8D66), was a Russian liquid rocket engine burning TG-02 and AK20F in the gas generator cycle used to deorbit spacecrafts. It was used as the breaking engine of the Vostok, the Voskhod and earlier Zenit, even though those later switched to solid engines.The engine produced 15.83 kilonewtons (3,560 lbf) of thrust with a isp of 266 seconds in vacuum for a single 45 seconds burn, which was enough for the deorbit. It had a main fixed combustion chamber and four small verniers to supply vector control. It was housed in the service module and had two toroidal tanks for pressurization.It was designed by OKB-2, the famous Isaev Design Bureau, for the Vostok programme. The breaking engine for the first manned spacecraft was a very difficult task that no design bureau wanted to take. It was considered very critical and a failure might have meant to see a man agonizing in space. A solid engine was considered, but the ballistic experts predicted a 500km landing error versus a tenth of that for a liquid engine. It took the coordinated efforts of his longtime friend, Boris Chertok and Sergei Korolev to convince Isaev to accept the task.".
- Q20744150 thumbnail Vostok_spacecraft_replica.jpg?width=300.
- Q20744150 wikiPageExternalLink main.php?id=53.
- Q20744150 wikiPageWikiLink Q15180.
- Q20744150 wikiPageWikiLink Q170842.
- Q20744150 wikiPageWikiLink Q189576.
- Q20744150 wikiPageWikiLink Q1970020.
- Q20744150 wikiPageWikiLink Q20744071.
- Q20744150 wikiPageWikiLink Q20829258.
- Q20744150 wikiPageWikiLink Q21412544.
- Q20744150 wikiPageWikiLink Q2659136.
- Q20744150 wikiPageWikiLink Q287638.
- Q20744150 wikiPageWikiLink Q335225.
- Q20744150 wikiPageWikiLink Q40218.
- Q20744150 wikiPageWikiLink Q4231574.
- Q20744150 wikiPageWikiLink Q431942.
- Q20744150 wikiPageWikiLink Q470193.
- Q20744150 wikiPageWikiLink Q51504.
- Q20744150 wikiPageWikiLink Q623873.
- Q20744150 wikiPageWikiLink Q624038.
- Q20744150 wikiPageWikiLink Q7020479.
- Q20744150 wikiPageWikiLink Q7142278.
- Q20744150 wikiPageWikiLink Q743135.
- Q20744150 wikiPageWikiLink Q841176.
- Q20744150 wikiPageWikiLink Q860308.
- Q20744150 wikiPageWikiLink Q901644.
- Q20744150 wikiPageWikiLink Q920454.
- Q20744150 comment "The S5.4 (AKA TDU-1, GRAU Index 8D66), was a Russian liquid rocket engine burning TG-02 and AK20F in the gas generator cycle used to deorbit spacecrafts. It was used as the breaking engine of the Vostok, the Voskhod and earlier Zenit, even though those later switched to solid engines.The engine produced 15.83 kilonewtons (3,560 lbf) of thrust with a isp of 266 seconds in vacuum for a single 45 seconds burn, which was enough for the deorbit.".
- Q20744150 label "S5.4".
- Q20744150 depiction Vostok_spacecraft_replica.jpg.
- Q20744150 homepage main.php?id=53.