Discussion
At Mach 2.0, the same relation \( (1 + 0.2M^2)^{3.5} \) gives a total to static pressure ratio of approximately
Answer: C
Substituting gives \( 1.8^{3.5} \approx 7.82 \). Comparing this with the 1.6 available at Mach 0.85 shows how completely ram compression dominates at high speed, and why a ramjet needs no compressor at all in that regime.
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