PPRuNe Forums - View Single Post - Density Alt and ISA Question
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Old 15th September 2010 | 02:29
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paco
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From: White Waltham, Prestwick & Calgary
Just add or subtract 120 feet for every degree above or below ISA, respectively (techinally it should be 118.8). You can find out what the ISA temp should be by lining up the 10s on you whizzwheel and looking in the little windows

Phil
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