Instruments Exam - Help!
Hi,
I understand how to work out the following questions using maths, just about but can anybody explain how you work this question out on the CRP5?
If pressure altitude is 40000 ft amsl, indicated TAT is -29, what is the Mach Number assuming ISA conditions.
a) 0.7
b) 0.75
c) 0.8
d) 0.85
I'm struggling to remember all the formulae for these exams so was just wondering if there is a quick way on the CRP5 to work this out.
Please can anyone help?
Many Thanks