| 摘要 |
<p>The pontoon shaped high speed power boat has a modified ball shape. It has a prismatic cross-section with two keel lines (1c) symmetrically spaced about the centre line (B, C). The hull bottom is concave between the keels whose spacing is between 30% and 70% of the width of the hull. The hull is wedge shaped in side view, with a shallow forward entry angle to plane easily.</p> |
