| 摘要 |
A powerboat includes a hull, a driving mechanism, which is formed of an engine and a driveshaft and is mounted inside the hull around the connection area between the bottom and transom of the hull, a shield fastened to the transom outside the hull and defining a semicircular waterway, a guide wing affixed to the bottom side of the shield, and a propeller unit, which is installed in the rear side of the shield and affixed to the guide wing and which has a front propeller coupled to the driveshaft, a rear rudder, and a vane wheel set between the propeller and the rudder.
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