What is ISA and how do one determine it when say flying with the C90 at 23000ft using AS2012???

 

Thanks

I believe ISA temp would be around -30* C under ISA conditions at 23,000ft

I used the chart on page 6 of this PDF (try your best to ignore the rest of that document, it'll make your head spin!) :)

 

http://home.anadolu.edu.tr/~mcavcar/common/ISAweb.pdf

I used the chart on page 6 of this PDF (try your best to ignore the rest of that document, it'll make your head spin!) :)

 

http://home.anadolu....mmon/ISAweb.pdf

 

Thanks alot, will "study" the doc - I see what you mean!!

15 - (2 * 23) = -31C