| 摘要 |
<p>A projectile device comprises a spherical core (1) with a flaccid circular wing (2) extending radially from its equator (4). Grooves (3) formed in the surface of wing (2) and core (1) provide increased friction. The device can be skimmed through the air or thrown like a ball and the wing (2) provides an increased surface area for easy catching.</p> |
