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Which is not a feature of the first new NACA airfoil (GA(W)-1 or the Whitcomb airfoil) developed?

Which is not a feature of the first new NACA airfoil (GA(W)-1 or the Whitcomb airfoil) developed? Correct Answer Higher symmetry

The larger leading edge radius gave a reduced peak in pressure coefficient at the leading edge. The trailing edge was cusped which increased camber, thus decreasing symmetry. These features reduced flow separation and gave a higher value of maximum lift coefficient.

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