Discussion
Assertion (A): A leading edge slat increases the maximum lift coefficient of a wing.
Reason (R): A slat increases the wing area in the same way as a Fowler flap.
Select the correct answer from the options below.
Answer: B
Correct answer: A is true but R is false
The assertion is correct: a slat raises the maximum lift coefficient substantially. The reason is not the mechanism. A slat works by passing high-energy air through the slot onto the upper surface so that the boundary layer resists separation to a higher incidence. Area increase is the Fowler flap’s distinguishing feature, not the slat’s.
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