What is the pressure ratio of an aircraft moving in air at a mach number 1?(a) 1.893(b) 1.558(c) 1.444(d) 1.555This question was addressed to me by my college director while I was bunking the class.This is a very interesting question from Measurement of Airspeed in portion Atmosphere and Air Data Measurement of Aircraft Performance

What is the pressure ratio of an aircraft moving in air at a mach numb

1.	What is the pressure ratio of an aircraft moving in air at a mach number 1?(a) 1.893(b) 1.558(c) 1.444(d) 1.555This question was addressed to me by my college director while I was bunking the class.This is a very interesting question from Measurement of Airspeed in portion Atmosphere and Air Data Measurement of Aircraft Performance
Answer» RIGHT option is (a) 1.893 The explanation is: The answer is 0.458. Given M=1. We know γ of AIR is 1.4. From \(\FRAC{p_1}{p_2}=\Big\{1+\frac{\GAMMA-1}{2}(M)^2\Big\}^\frac{\gamma}{\gamma-1}\) On substituting the values \(\frac{p_1}{p_2}=\Big\{1+\frac{1.4-1}{2} 1^2\Big\}^\frac{1.4}{1.4-1}\) \(\frac{p_1}{p_2}\)=1.893.

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