| 摘要 |
PURPOSE: A cannonball for training is provided to accept weight inside a cannon ball body selectively, thereby capable of coping with the weight change of a cannon ball. CONSTITUTION: A cannonball for training comprises a body(100), a spike(110), airfoils(120), an adapter(130), and a peeling(140). A weight(182) is accepted inside weight space(18). The spike is installed in a front-end part of the body, and collides with a target. Wings are installed in a rear part of a body, and guides flying. The adapter is installed between the body and the wing, and connects the body and the wing. The peering surrounds the body, the wings and the outside of the adapter, and guides the cannonball in order to accurately shoot the cannonball from a barrel.
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