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Old 30th April 2008, 03:50 AM   #18
geo
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Join Date: Aug 2006
Posts: 327
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JM,
???
As far as I know, black coloured objects will have better radiating thermal exchange properties, and this will make them get cool or hot faster depending to the temperature of the other radiating objects (in the case of a sail in Sunlight: the Sun surface is about5,800 K or 5,500 C) and relative angle of view; but it makes no difference as to conduction and convection. My air cooled bike's engine is not black, just light metal.
Don't think this makes any difference as to speed.
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