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- Path: sparky!uunet!gatech!emory!emoryu1!labrg
- From: labrg@emory.edu (Ryan Montieth Gill)
- Newsgroups: sci.space.shuttle
- Subject: Re: black tiles on the space shuttle
- Message-ID: <1732@emoryu1.cc.emory.edu>
- Date: 29 Dec 92 21:14:02 GMT
- References: <725334983@romeo.cs.duke.edu>
- Organization: Emory University, Atlanta, GA
- Lines: 21
- X-Newsreader: Tin 1.1 PL3
-
- jwt@duke.cs.duke.edu (Jeffrey W. Tannehill) writes:
- :
- :
- : For Christmas I received a Space Shuttle model with instructions to
- : paint the underside black. This brought up the question "Why is the
- : bottom of the Shuttle black?" It occurred to us that a black surface might
- : absorb a lot more radiation and that in space there might be greater
- : exposure to radiation than on earth, so why isn't the whole shuttle white
- : or perhaps silver to reflect as much as possible?
-
-
- Colour affects heat absorption in cases where the heat is being
- radiated. The shuttle experiences heat absorption due to friction.
- The SR-71 is black. The skin of the plane is aligned perfectly so
- that when the skin begins to ripple (sortof like coorogated sheet
- metal), the ridges and valleys are set up so that they are in line
- with the air flow. If you take a sheet of white paper and a
- sheet of black paper and rub each on a smooth surface they should
- both heat at the same rate....
-
- Ryan
-