At first it is best to go for a fairly traditional two bladed affair, maybe lie the ones shown above The angle between the two arms is typically 60 to 110 degrees. Boomerangs need to be bent to keep them stable as they spin. Larger boomerangs are heavier to throw and catch but don t need as much flick of the wrist when thrown and so respond well to new throwers, but don t necessarily go further.
Smaller ones are quicker, cheaper and lighter to make, but take more flick of the wrist to throw.
A good start is always to copy a boomerang that you like. Draw your shape on paper first, then trace it onto wood. To actually cut it, an electric jig saw is ideal if you can get hold of one. They are straight forward to use and relatively effortless, but mind the kitchen table. If you don t have an electric jigsaw, then hand tools can be used.