To take a carved piece of wood and throw it 150 feet away, only to have it turn and fly back to you to be caught, is like making a 3 point shot in basketball. You have to go and get your disc or ball. Your boomerang, on the other hand, comes back to you to be thrown again. Tuning Your Boomerang After you have learned to throw properly, you will learn the characteristics of your boomerang. If you boomerang refuses to fly properly, even though you have learned to judge the wind and have mastered the layover concept, there are several things you can do to improve its flight.
Most boomerangs require positive dihedral.
Lay your boomerang on a flat surface with the paint side up. The other wing should be lifted a few millimeters off of the surface as if the boomerang has a slight v shape. This is positive dihedral. This helps give the boomerang lift. If your boomerang goes too high you need to decrease the positive dihedral.