The boomerang spins forward and then rises and begins a curved path back to the thrower. Returning boomerangs are used mainly for the sport of boomerang throwing. They ar unsuitable weapons for most types of hunting because their circular flight paths make them difficult to aim. A boomerangs flight depends on its shape and size and how it is thrown. Winds also influence its flight.
Most boomerangs have a bend near the middle that forms two wings shaped like aeroplane wings.
Each wing if flat on the bottom and curved on the top. One edge is thicker than the other. As a boomerang spins wing over wing in flight, its shape causes lower air pressure above each wing than below it. This difference in pressure helps keep the boomerang airborne. Some boomerangs have a shallow, hollowed out-area on the underside of one wing to provide added lift.