Discussion
Inlet pressure recovery against flight Mach number for two inlet types.
| Mach number | Pitot inlet | Two-shock inlet |
|---|---|---|
| 0.8 | 0.98 | 0.98 |
| 1.4 | 0.93 | 0.96 |
| 2.0 | 0.72 | 0.91 |
| 2.5 | 0.50 | 0.86 |
What does the table establish about inlet choice?
Answer: B
The two are indistinguishable subsonically, where the simple duct is obviously preferable, but the pitot collapses once the normal shock strengthens. The crossover is where compression inlets start to be worth their weight and complexity.
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