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[i]The tanks that hold the super-cold fuel in the Apollo spacecraft Service Module are so well insulated that [URL=http://htmlimg2.scribdassets.com/8nuqbi3csgrle4v/images/329-c494e5f0e0.jpg]ice cubes placed inside the tanks[/URL] would take eight and one-half years to melt. The Command Module offers 73 cubic feet per man as against the 68 cubic feet per man in a compact car. By comparison, the Mercury spacecraft offered 55 cubic feet for its one traveler and Gemini provided 40 cubic feet per man. The tanks that hold the cryogenic (ultra-cold) liquid oxygen and liquid hydrogen on the Apollo spacecraft come close to being the only leak-free vessels ever built. If an automobile tire leaked at the same rate that these tanks do, it would take the tire 32,400,000 years to go flat.[/i]
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