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Apply shuttle ET foam in a vacuum.



 
 
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  #35  
Old August 1st 05, 11:48 PM
Jan Owen
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I think it's simply AWESOME how many more experts on this subject are here
on SAA than there are in all of NASA or aeronautical/space engineering.

Simply STUNNING!

SAA never fails to impress...

ACKKKKK!!!!!!!!!!!!!

--
Jan Owen

To reach me directly, remove the Z, if one appears in my e-mail address...
Latitude: 33.662
Longitude: -112.3272
"Mr Scott" wrote in message
...
Interesting idea.


Is it the solution?



  #36  
Old August 2nd 05, 12:53 AM
Alex Terrell
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George William Herbert wrote:

Alas, you neglect the OTHER reason there's foam on the
external tank.

Lots of stuff is ablative to resist heat loads on ascent.
If that was all there was to it, there'd be a think spray on layer
of fiberglass or something there.

How much of an issue is this. The ET is cooled from the inside by
cyogenic propellants, which can afford to warm up during launch as
their pressure is falling. How hot can Aluminium get if its got LOX on
one side?

The pre-launch reason to have foam there is to prevent ice buildup
on the outside of the tank. Because, if you think foam shedding is
bad for Shuttle Tiles and RCC leading edge sections, you should
see what ten pounds of nice solid liquid-hydrogen subchilled
water ice will do to any surface of the shuttle...


If this is the major reason, why not ditch the foam 30 seconds before
launch. Ice build up after that would be negligible.

Foam on the outside does both jobs. Foam on the inside of the tanks
would help prevent water ice buildup on the outside, but not help
with ascent heating.


Would probbaly make things worse, as the structural material would no
longer be cooled by the cryogenic material inside.

  #37  
Old August 2nd 05, 01:08 AM
Pat Flannery
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Jim Davis wrote:

Of course, for women substitute Pam for WD-40.



If that's Pam Anderson, wouldn't that be more like W-44D? ;-)

Pat
  #38  
Old August 2nd 05, 02:36 AM
Dr. P. Quackenbush
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"John Steinberg" wrote in message
...
Dr. P. Quackenbush wrote:

Um, your idea, YOUR homework. My job is not to prove your ideas will

work
or not. You bring it to the table, you prove it can work. Those are

the
rules of life.


No, it wasn't my idea at all. I'm not the OP, Quack.

Frankly, I see no advantage to applying foam in a vacuum when the
launch site is so pregnant with problematic humidity and the foam
and/or application thereof is not a suitable material or process and/or
the existing shuttle design is just too flawed to fix.

You opined that there was a "probable need for increased pumping
capacity," which indicates you don't know if there is an actual need,
which finally suggests you were passing the burden of proof forward.

Is there a need? Huh?



I checked with the nice folks at Ames. Yes, there's a need. Thanks for
asking.


  #40  
Old August 2nd 05, 09:42 AM
Brad Guth
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Jan Owen,
The only sorry aspect of our NASA that's impressive are the LLPOF
factors of how they've gotten so many nice and undeserving folks quite
dead. At least I'm impressed.

BTW; what would you think about a structural tank insulation worth of
R-1024/m
~

Don't look now: in spite of the orchestrated status quo, it seems
there's been other life upon Venus
http://guthvenus.tripod.com/gv-town.htm
Russian/China LSE-CM/ISS (Lunar Space Elevator) as situated within the
ME-L1/EM-L2 sweet-spot
http://guthvenus.tripod.com/lunar-space-elevator.htm
Venus ETs, Earthly ETs plus a few other somewhat testy topics by; Brad
Guth / GASA-IEIS
http://guthvenus.tripod.com/gv-topics.htm

 




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