Discussion
An engine demands \( 90 \ \mathrm{kg/s} \) while the intake at that condition would capture \( 110 \ \mathrm{kg/s} \). The mass flow spilled is
Answer: B
The difference of 20 kilograms per second must flow around the intake instead of through it. Turning that air produces spillage drag, which is worst when the engine is throttled at high speed and the capture area cannot be reduced.
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