I was wondering if there was an optimal law for the thrust (magnitude and direction) during the lunar ascent. I have read many things about this topic in this forum but I still have some doubts. It should be a linear steering law, but what are the values of the constants? What is the actual guidance law used in Apollo 11 for? There is no non-linear parameterization fot the thrust angle that also changes according to the direction of the velocity of LM?
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NASA's technical archive: http://ntrs.nasa.gov/ – Hobbes Feb 14 '19 at 15:57
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It's basically a gravity turn after the initial climb to avoid terrain. I don't believe the ascent engine was throttleable. – Feb 14 '19 at 16:28
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@JCRM Correct, the ascent engine didn't throttle. – Russell Borogove Feb 14 '19 at 17:12
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Related: How does the Apollo LM ascent guidance program work? – Russell Borogove Feb 14 '19 at 17:13
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Is it possible to talk directly with an user? In particular I would have some questions for @RussellBorogove because I just read his analysis of this problem. Thanks :) – Tommaso Scali Mar 03 '19 at 17:17
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I've created a chat room for the topic; be aware that it is public. https://chat.stackexchange.com/rooms/info/90521/lm-ascent?tab=general – Russell Borogove Mar 03 '19 at 17:52
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Thanks @RussellBorogove. Unfortunately I can't talk in that chat because apparently I don't have enough "reputation" points. – Tommaso Scali Mar 06 '19 at 10:09