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Old 26th February 2003 | 20:28
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BUDGIE
 
Joined: Jun 2001
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Unhappy Forgot How To Work A Crp5!!

Help!

I tried to answer this question using a CRP5 and keep getting -19 degrees centigrade.........

You are flying in a Standard ISA atmosphere at 30'000 at Mach 0.84 what is your ISA TAT?

Now if I use the formula TAT=SAT(1+0.2kMsqrd)

SAT = 15-(30 * 2)= -45 in Kelvin = 228(1+0.2(1)((0.84)sqrd))=260
so 260-273 (I'm assuming a perfect probe for value k=1)

I get -13 degrees centrigrade.........can someone talk me through doing it on the CRP5?

Thanks in advance,
BUDGIE
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