Discussion
An airfoil designed for low speed flight would typically have
Answer: B
Correct answer: A generous leading edge radius and moderate camber
Low speed flight means operating at high lift coefficients and reaching high angles of attack, so what matters is a high maximum lift coefficient and a gentle stall. A generous leading edge radius keeps the suction peak moderate and gives a trailing edge stall with warning, and camber raises the maximum lift. Compressibility is not a concern, so thickness costs little.
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