Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ukma!gatech!hubcap!ncrcae!ncrlnk!ncrcce!johnson
From: johnson@ncrcce.StPaul.NCR.COM (Wayne D. T. Johnson)
Newsgroups: sci.space.shuttle
Subject: Re: That SRB flame
Keywords: Remember the Saturn V
Message-ID: <812@ncrcce.StPaul.NCR.COM>
Date: 4 Oct 88 17:39:10 GMT
References: <3447@ihuxz.ATT.COM> <141@enuxha.UUCP>
Reply-To: johnson@ncrcce.StPaul.NCR.COM (Wayne D. T. Johnson)
Organization: NCR Comten, Inc.
Lines: 22

In article <141@enuxha.UUCP> kluksdah@enuxha.UUCP (Norman C. Kluksdahl) writes:
>Now, this raises some interesting questions regarding the shuttle.  If the
>backflow problem can be this severe, what is the effect of the backflow from
>the SRB's and the three SSME's??  It seems to me that the critial area for
>backflow would be at the base of the external tank.  If this is the case,
>then I hope that the ET has very good insulation in that area.
>
It depends, since the LOX and hydrogen are extreamly cold, is it possible that
this backflow heating of the ET simply supplies additional pressure to empty 
the tank?

Actualy, I don't think this is much of a problem, if they discovered the
problem on the Saturns, they should have enough engineering knowhow to
predict it on the Shuttle.

The flame I saw seemed to move around a lot, unlike the challenger, and was
usualy going away from the ET.
-- 
Wayne Johnson                 (Voice) 612-638-7665
NCR Comten, Inc.             (E-MAIL) W.Johnson@StPaul.NCR.COM or
Roseville MN 55113                    johnson@c10sd1.StPaul.NCR.COM
These opinions (or spelling) do not necessarily reflect those of NCR Comten.