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Why does the trailing edge of a supercritical airfoil have a cusp-like shape?

Why does the trailing edge of a supercritical airfoil have a cusp-like shape? Correct Answer Counter highly negative camber at the front end

Due to the presence of flatter top surface in supercritical airfoil, the 60% of the front end of airfoil is highly cambered resulting in less lift. To counter the reduced lift, positive camber is provided at the bottom aft section of the airfoil by giving it a cusp-like shape. This increases the lift.

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