Discussion
The lift curve slope of a wing in supersonic flow, as the Mach number is increased further,
Answer: B
Linearised supersonic theory divides by the square root of the Mach number squared minus one, and that radical grows with speed, so the slope shrinks. This is the reverse of the subsonic Prandtl-Glauert trend, and it means a supersonic aircraft needs more incidence, and pays more drag, for a given manoeuvre.
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