Dihedral-The wings have a dihedral of about 5-15 degrees. The wings should also have a angle of attack of about 2 degrees.It is to stabilize the gilder while flying,without a dihedral angle it is not as good as a gilder that has a dihedral angle.
Airfoil shape-To avoid flow-detachment and "stall," the leading edge of an airfoil must be rounded. To produce flow-deflection as well as the "circulation" required for lift, the trailing edge of an airfoil must be fairly sharp. It is better for gilding because the bottom of the airfoil higher pressure, and the top has a lower pressure while running and it will create a lift.
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