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Color curve chart
There's a chart listing ambient temperature, surface temperature and
color that composite builders take as gospel. I'm trying to get more information about it http://hallert.net/cozy/images/ColorCurveChart.gif It originally comes from the Long EZ plans, Chapter 25, page 1 in the plans and there's a handwritten note on the chart that says "Soaring Sept 1975." I have a call in to SSA, and they haven't been able to find a copy of that issue. Does anyone have a copy? In the testing that I'm doing, these temperatures seem high. White surfaces don't seem to be more than about 10 degrees F higher than ambient, the chart shows a white surface on a 30 degree day at 85 degrees. Yesterday it was hot in So Ca, 90 degrees ambient - but black surfaces were coming out at 185, not 210. If anyone knows what methods were used to gether these numbers, I'd be thankful. |
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