| 摘要 |
A boomerang comprising a central hub having a generally central aperture therein, a plurality of equally spaced, cambered blades extending generally radially outwardly from the hub, a tip depending generally downwardly from each of the blades but one, the included angle between each blade and its respective tip being greater than 90.degree., and a weight on the blade without a tip so that the boomerang is mass balanced about an axis through the center of the hub. The included angle between each successive tip and its respective blade may increase in either the clockwise or counterclockwise direction around the boomerang. |
