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dreada5
Guest
I know there's another thread on NASA's continuing troubles with ET foam. RE: this story,<br />http://www.cnn.com/2005/TECH/space/11/22/space.shuttle/index.html<br /><br />But I just had a couple questions on a different note,<br /><br />1) How difficult would it be in terms of time/cost to redesign the ET internally so that it still contains the supercold fuels but by the use of some other type of active refridgeration system - without the need for foam?<br /><br />2) Why doesn't NASA go back to using freon to thermally insulate the ET? Afterall NASA would only operate with freon for 5 years to complete ISS. <br /><br /><i>Note: Prior to 1997... although NASA was exempted from [new] legislation that called for a reduction in freon use, and the amount of freon used in the tank contributed minimally to total freon use, the composition of the foam was changed [to this new problematic composition] in response. (Quote from Wikepedia)</i>