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Surface vs Submerged

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Surface vs Submerged

Old 05-01-2007, 08:22 PM
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rozzibandit
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Default Surface vs Submerged

What is are pros and cons of each type of drive? Is one better than the other and in what conditions ? I am trying to learn a bit here and would appreciate your knowledge.
I am building a large v hull over 60" and just doing some homework.
Old 05-01-2007, 09:30 PM
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jetpack
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Default RE: Surface vs Submerged

Submerged prop setups. More drag on motor, smaller prop diameter to keep RPM's up, however you have more control with trimming proper ride attitude with the strut angle to the hull, which is a speed and handling advantage, less prop walking. Boat stays glued better in the corners.

Surface props. Half the prop diameter out of the water, big diameter fan-style props are used without sacrificing RPM's. More straight-away speed can be achieved, but a decrease in ability to make trim changes. More cavitation in the corners, spin-outs and more prop walk tug in the straights. Risk of hurting the motor is greater, due to freewheeling over the bumps.

Thats about all the free thoughts I have. Let's hear more......

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