high altitude temperature
I was wondering if someone could clarify something for me? In the performance section of an aircraft QRH,there are temperatures for a given pressure altitude. For example, ISA -10, ISA+10. My question is this: What is ISA -10 at a pressure altitude of FL300 and what is ISA +10 at the same altitude? I'm getting mixed up with the double negative rule in addition and would like to clarify this once and for all. <img src="confused.gif" border="0">