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   sci.space.policy      Discussions about space policy      106,651 messages   

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   Message 104,920 of 106,651   
   Dean Markley to JF Mezei   
   Re: SN8 steel type   
   12 Oct 20 04:47:05   
   
   From: damarkley@gmail.com   
      
   On Sunday, October 11, 2020 at 7:37:45 PM UTC-4, JF Mezei wrote:   
   > On 2020-10-10 18:41, Snidely wrote:   
   >   
   > > An update -- in the first Snate cryo stream, the Nasa SpaceFlight   
   > > reporters indicated that SN8 is a hybrid, per Elon's msgs [tweets?].   
   > Strange. Also, strange that they started building SN8 with the new   
   > material before SN7 was tested. By the time SN7 was tested to failure,   
   > SN8 was already built. So improvements made with SN7.1 which did pass   
   > the tests (apparently) couldn't have been given to already built SN8.   
   > There is only so much retroactive welding you can do.   
   >   
   >   
   > Also, they found leaks in SN8 which had to be fixed. Surprised that by   
   > now, they haven't develop an ISO 9000 type of procedures to ensure welds   
   > are strong and perfect from the start without having to test to see   
   > where the leaks are and whether the thing will pop when filled.   
   >   
   > I'll have to hunt for Elon's tweets to see what he said. (Most of his   
   > traffic is responding to individuals, so following him doesn't show   
   > those responses).   
   SN8 was started before SN7 was tested because that's how iterative development   
   works.   As far as leaks, you are assuming they are at welds.  That is not   
   necessarily so.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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