Re: Shuttle lift-off questions

In article <e8iqo1$8qk_002@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, jmfbahciv@xxxxxxx writes:
In article <zbSqg.9$45.821@xxxxxxxxxxxxxxxxx>,
mmeron@xxxxxxxxxxxxxxxxxx wrote:
In article <e8g9gt$8qk_001@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
jmfbahciv@xxxxxxx writes:
In article <1152104183.822500.125410@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"Randy Poe" <poespam-trap@xxxxxxxxx> wrote:

jmfbahciv@xxxxxxx wrote:
Question 2: One of the reporters, who was talking about the
reason for one of the delays (cracks in the insulation) said
that the fuel tank expands when emptied and contracts when filled.
This is counterintuitive to me. If the reporter is correct,
why does this happen? I'm assuming that filling the tank
decreases inside pressure?

I can't find a definitive answer as to whether it expands or
contracts when fueled. I found some stuff that talks about
it "expanding and contracting" during fueling, other stuff
that says it expands when filled, and other stuff that
mentions cryogenic fuel (liquid hydrogen and oxygen)
that is replaced with warm air as it empties.

This means that the bleed valve has to be opened? I've never
thougth about how those things are filled and emptied in
terms of the plumbing. I know enough that I wouldn't want
to do that work (I'm a wimp) :-) Or am I wrong about the
plumbing, too?


Possibly it is that change of temperature that accounts
for what the reporter was saying.

When I freeze something it expands; but this is solids.

Other than very few exceptions, stuff contracts, *not* expands, on
cooling.

Yup,yup. That's my bug. I'm a stup but I did achieve honestly;
I can't recall playing with anything but water.

Yes, thought so.

Food is water.

That is true. So, you didn't realize that the common stuff you play
with is exceptional.

Mati Meron | "When you argue with a fool,
meron@xxxxxxxxxxxxxxxxx | chances are he is doing just the same"
.

Relevant Pages

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    ... that the fuel tank expands when emptied and contracts when filled. ... that is replaced with warm air as it empties. ...
    (sci.physics)
  • Re: Shuttle lift-off questions
    ... that the fuel tank expands when emptied and contracts when filled. ... that is replaced with warm air as it empties. ... for what the reporter was saying. ...
    (sci.physics)
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  • Re: Shuttle lift-off questions
    ... that the fuel tank expands when emptied and contracts when filled. ... that is replaced with warm air as it empties. ... That frozen stuff floats on top of liquid stuff, ...
    (sci.physics)
  • Re: Shuttle lift-off questions
    ... that the fuel tank expands when emptied and contracts when filled. ... that is replaced with warm air as it empties. ... Other than very few exceptions, stuff contracts, *not* expands, on ...
    (sci.physics)