India's Mars probe (MOM), Development, launch, and cruise to Mars |
India's Mars probe (MOM), Development, launch, and cruise to Mars |
Aug 31 2009, 08:10 PM
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
according to the Chinese Xinhua press agency an Indian Mars probe may be launched in 2013 or 2015, after Chandrayaan-2
http://news.xinhuanet.com/english/2009-08/...nt_11972334.htm |
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Nov 11 2013, 08:59 PM
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
http://www.planetary.org/blogs/emily-lakda...ion-update.html
A schematic of the propulsion system plumbing would be needed to completely make sense of this. Normally, redundant latch valves are in parallel so that either one or the other can control flow to the engine (and there are normally-open pyro valves in the lines that can shut one leg down if its valve sticks open.) I haven't heard of needing or wanting both open since if they behaved differently they wouldn't be truly redundant (a crude form of throttling?). Perhaps in trying this there was some flow-splitting problem and the flow rates weren't what they wanted. At any rate it seems a bit odd -- hopefully this afternoon's burn will go well. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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