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#9
May 9th 07, 04:36 PM
posted to rec.aviation.homebuilt
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OSH ...aluminum needs polishing. HELP!!
Bill Daniels wrote:
The following is from Bellcore. The first number is the solar energy absorbed the second is the low temperature heat radiation. As you can see, polished alumunum absorbs only slightly more than white paint but radiates only 6% as much heat. In other words, although it absorbs little, it radiates much less so it heats up more than any painted surface. Polished Aluminum .15 .06 White .14 .97 Yellow .30 .95 Cream .25 .95 Light Grey, Green Blue .50 .87 Med. Grey, Green Blue .75 .95 Dark Grey, Green Blue .95 .95 Black .97 .96 Hmm? You think this may be why so many airplanes are mostly white? 
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