Thread: Apollo 13 ?
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Old January 31st 13, 01:19 PM posted to sci.space.history
Dean
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Default Apollo 13 ?

On Wednesday, January 30, 2013 5:02:35 PM UTC-5, Brad Guth wrote:
On Jan 30, 5:32*am, Jeff Findley wrote:

In article 88cd94a3-ee17-467b-8ac2-b2b489452627


@u1g2000yql.googlegroups.com, says...








On Jan 29, 4:55*pm, Brad Guth wrote:




Body heat of 450 watts plus full sunlight always on half of the craft


in addition to the secondary influx of moon IR as well as the


unavoidable planetshine IR, is simply not going to provide any


freezing cold cabin environment unless their HVAC system was blasting


away with cold air.




You're quite wrong. *"Space is cold", especially when you're beyond LEO


and don't have the heat of the earth aimed at half your ship.




the side of the vehicle in darness radiates the body heat fast. the


LMs walls were paper thin and not well insulated due to weight


constraints




Thermal design of the LEM is far more complicated than your gross


oversimplification.




Jeff


--


"the perennial claim that hypersonic airbreathing propulsion would


magically make space launch cheaper is nonsense -- LOX is much cheaper


than advanced airbreathing engines, and so are the tanks to put it in


and the extra thrust to carry it." - Henry Spencer




At 1 AU the solar influx is the same, and the matter of getting rid of

surplus heat from any spacecraft that's not specifically configured

for such, is downright difficult. It's worse when there's 1220 w/m2

coming off the illuminated surface of our physically dark moon, in

addition to the planetshine influx contributing a bit more IR. All

three influx sources of energy added to the internal 450+ watts of

heat from three humans is going to make their cabin interior anything

but cold.


And there it is: Our resident conspirowhacko chimes in with his infamous "physically dark moon" catchphrase.