I will give my own dissertation on what makes a boomerang work and why they are such a great choice for the person who just wants to relax and enjoy a different sport. These are a few of my personal boomerangs. He bought it in Australia in 1970. The hook was one of my other prototypes that I decided to keep for myself. The boomerang is thrown nearly perpendicular to the ground, slightly above the horizon and with a flick of the wrist so it will spin.
Gyroscopic precession is the force that keeps the boomerang standing upright as it spins.
As the spin decreases, the boomerang will lay over and lift higher through the course of the circle. When an average boomerang is thrown properly, it will circle and slowly climb until it is spinning flat above your head where it stalls and falls into your waiting hands. When this type of flight is achieved, it gives one the feeling of true accomplishment. If your boomerang falls to your left or right, try leaning the boomerang away from that direction. If it falls in front of you, you need to throw it higher, if behind you, try throwing it lower.