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← ScienceWhich phenomenon causes increased fuel burn when an aircraft exceeds its designed airspeed?
A)Elevated induced drag
B)Enhanced turbulent flow✓
C)Aggravated skin friction
D)Ameliorated form drag
💡 Explanation
Increased airspeed causes a transition to turbulent flow, whose effect on skin friction (drag) the Bernoulli equation underestimates; therefore fuel usage rises to overcome this increased drag, rather than induced drag alone predominating at higher speeds.
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