Which temperature? For ambient (T), I'm using http://www.wolframalpha.com/input/?i=temperature+at+15000m http://www.wolframalpha.com/input/?i=temperature+at+15

Which temperature? For ambient (T), I'm using http://www.wolframalpha.com/input/?i=temperature+at+15000m http://www.wolframalpha.com/input/?i=temperature+at+15000m as the data. Also see http://en.wikipedia.org/wiki/Atmospheric_temperature#mediaviewer/File:Comparison_US_standard_atmosphere_1962.svg http://en.wikipedia.org/wiki/Atmospheric_temperature#mediavi... The temperature experienced by the pilot as he was ejected was is calculated as the stagnation temperature (temperature on the surface of his clothing, or where the speed of the air = 0), which at Mach 1 would be around -12C. However this temperature will decrease as he slow down. Luckily it should take only about.. 45 seconds for him to get around 5000m, which becomes much more survivable. Edit: from that page you linked, it says: > Between 11 km and 20 km the temperature remains constant.