From: jfindley@cinci.nospam.rr.com   
      
   In article , nospam@127.0.0.1 says...   
   >   
   > On 2021-03-04 4:14 PM, Snidely wrote:   
   > >   
   > > It looked to me like the exhaust of one of the engines was more yellow   
   > > than the others.   
   > >   
   > > /dps   
   > >   
   >   
   > Yes it appears to have been running fuel rich. There's a bit of dark   
   > smoke involved as well which can be seen in some of the ascent videos.   
   >   
   > Also seems to have been a methane leak after bouncedown that eventually   
   > ignited. Also there were seen to be excessive methane leakage even as   
   > SN10 was conducting its single engine power down descent. It   
   > occasionally flared up in flame at least twice and there was a fire   
   > on-going after it came to 'rest' before the rapid unscheduled relaunch   
   > and disassembly.   
   >   
   > See Scott Manley video mentioned elsewhere in this thread for details.   
   > As he points out (and I have to agree) the RUD appears to be due to an   
   > oxygen tank pressure failure which ruptured both tanks, largely   
   > propelled the SN10 re-aloft and trigger the subsequent explosion.   
      
   Elon Musk tweeted that the hard landing was caused by the landing Raptor   
   being commanded to high thrust, but the thrust level didn't change.  He   
   said they have not seen that before.   
      
   > The landing 'legs' or pogos as I prefer to call them seem to be the   
   next   
   > issue now. Manley shows video that clearly shows several that failed to   
   > lock into position and three that do.   
      
   The landing legs have already been redesigned, but we won't see them   
   until a later SN#.  Iterating this rapidly means there is a delay caused   
   by learning a lesson, designing a fix, and incorporating that fix into a   
   later SN#.   
      
   Jeff   
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