rocker bottom hull jet drive
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rocker bottom hull jet drive

  1. #1
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    Default rocker bottom hull jet drive

    I am building an amphibious vehicle (aluminium hull 20 ftX8ft. at Gvw5500#the null is 6* degree dead rise there is a slight rocker in keel about3 degrees. boston whaler or sea sled type hull with wheels in outboard sponsons. is a 350 chev /powerglide .powering an american turbine up to it? how do jet drive perform at lower speeds.gas consumption? or will it plane? do i have to always get it up on a plane? need estimate on planing speed, rpm and h.p.?
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    Last edited by rick gray; 02-10-2014 at 04:48 PM. Reason: data to add

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  3. #2
    Ain't Right Racin piston in the wind's Avatar
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    Ok I'll bite... If it does plain it will drink a bunch of fuel. I would worry about it stuffing a wave. 400 hp just to break plain if you can keep the pump hooked up. Just a guess. Weight dist ect... ect... I think it's a neat deal keep us posted !!
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  4. #3
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    Default amphibian SUV.

    Quote Originally Posted by piston in the wind View Post
    Ok I'll bite... If it does plain it will drink a bunch of fuel. I would worry about it stuffing a wave. 400 hp just to break plain if you can keep the pump hooked up. Just a guess. Weight dist ect... ect... I think it's a neat deal keep us posted !!
    was told by american turbine sales that a 350 (250+ hp) should push it 5500# gvw what is stuffing a wave?. do not know if the jet impeller can be changed to get more push?

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  6. #4
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    Stuffing a wave is when the bow of the boat goes through the wave instead of over it. With the weight you're talking and the power, I think it will move, but not enough to plan. The amphibious 770 of the '50s did 70mph on land and 7 on the water. I like the idea you're going with. Make a boat into an amphibious. Keep us posted.

    Tim

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