Re: In The Shadow Of the Moon



Greg D. Moore (Strider) wrote:
"Pat Flannery" <flanner@xxxxxxxxxx> wrote in message news:13kakgjn4qgoga0@xxxxxxxxxxxxxxxxxxxxx
Greg D. Moore (Strider) wrote:
Turned the CSM so the SM was between him and the Sun.

That's a very clever technique...mind you it's going to get a tad cold in the CM after a while, without the standard barbecue roll.

This would have been only for a short-while.
Or would it? The remaining astronaut and all the early electronics in the CM would be generating considerable heat in what is in effect a vacuum bottle. The Kapton on the exterior of the CM was designed to prevent it from not picking up too much heat from the sun, not hold heat in; the SM had quite large radiator assemblies to let the heat of the crew and electronics be radiated into space, much in the way the Shuttle uses its huge radiators inside the cargo bay doors to get rid of excess heat - and if the doors don't open, has to get back down within around three orbits IIRC, to prevent overheating.
Unlike Apollo 13, you'd be talking about a CM at full power from the fuel cells in the SM.
With the early electronics used on it, thermal output could be quite high from its internal electronics, and given its robust and well insulated exterior to allow it do a reentry at around 22,000 mph without the crew being overheated by the heating of its exterior to its interior via either the heat of the reentry IR flux around it hitting it exterior and being absorbed, or direct heating of its interior via conduction through its hull via its metallic structure.
One way or another, the CM was very well insulated between its exterior and where the crew sat; and that insulation works both ways; what keeps exterior heat out keeps interior heat in.

Pat
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