Marine propulsion – Screw propeller – Having means to control flow around propeller
Patent
1986-01-27
1987-03-24
Barefoot, Galen
Marine propulsion
Screw propeller
Having means to control flow around propeller
114288, G63H 516
Patent
active
046522450
ABSTRACT:
An improved shallow draft boat useful for coastal fishing or shrimping operations is provided which substantially reduces drag and thus power requirements, and is so maneuverable that the boat can actually be turned completely within its own length without spinning out. The boat includes an elongated hull having an amidships, funnel-shaped motor well along with an axial trough extending from the well to the boat fan-tail; the trough is preferably of decreasing cross-sectional area along its length so that prop wash created by the motor is forced through a progressively smaller volume, thus producing an uplifting force adjacent the boat's stern. Hence, the boat may pass through very shallow water (as little as about eight inches in depth), at full power inasmuch as the boat actually rides upon the motor prop and flattened stern areas of the hull with very little draft. The trough construction also facilitates turning by creating a wall of water which must be shifted right or left; this allows the bow to come around very quickly for easy handling in restricted areas.
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Barefoot Galen
Sotelo Jesus D.
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