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Old 27th Feb 2010, 11:22
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rudderrudderrat
 
Join Date: Oct 2009
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Hi 18-Wheeler,

The thermal coefficient of expansion for Aluminium is about 23 * 10 to the minus 6 / degree C.

My spread sheet says that a 20 deg change in temp on a 747 fuselage (70 metres) amounts to 32 mm. So I can quite easily believe your figure of 75 mm.
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