Hydroplane

Discussion in 'Boat Design' started by dmgetz14, Jan 31, 2012.

  1. dmgetz14
    Joined: Jan 2012
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    dmgetz14 New Member

    I would like to build a hydroplane that would be able to achieve somewhat of a plane with a 3-5hp motor on the back but be able to accomodate up to a 10hp. If this is possible, does anybody have plans?



    If i were to build one from scratch, what type of wood would be best? I would then cover whatever material with a fiberglass sheet and marine epoxy.
     
    Last edited: Jan 31, 2012
  2. hoytedow
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    hoytedow Carbon Based Life Form

  3. messabout
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    messabout Senior Member

    Rob White and Sons have plans and instructions for a 16 foot by 43 inch stripper that claims to plane two adults with 4 horse power. I'd be skeptical if the claim was from someone else. Robb, now deceased, was a most inventive and industrious guy who pretty much proved his claims. In this case I think that the boat will do what they say.

    Check this out at www.robbwhite.com
     
    Last edited by a moderator: Feb 2, 2012
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  4. FranklinRatliff

    FranklinRatliff Previous Member

  5. Plywood Tom
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    Plywood Tom Junior Member

    I built a 10' racing pram about 15 yr ago, it planed at about 12mph with a 5hp air cooled Sears engine.
     
  6. hoytedow
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    hoytedow Carbon Based Life Form

    What was the total weight?
     
  7. Plywood Tom
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    Plywood Tom Junior Member

    I never weighed it, but I would guess about 125#. It was 1/4" plywood. I would post a pic, but it is not on the net.
     
  8. hoytedow
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    hoytedow Carbon Based Life Form

    I should have said, "What was the total weight, loaded?".
     
  9. Plywood Tom
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    Plywood Tom Junior Member

    Boat 125#
    Outboard 35#
    Boy 80#
    _________
    240#

    Again, these are guesses leaning to the heavy side.:)
     
  10. Jimboat
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    Jimboat Senior Member

    The MiniMax should plane with 5hp at 10-15mph, depending on your weight. Would be better with 10hp, though.
     
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  11. hoytedow
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    hoytedow Carbon Based Life Form

    So, you got it to plane with 48# per hp. I can see that happening. My first boat did about 10 mph with a 5 hp sears but I weighed about 142# with 24 sf flat bottom and angular bow to total length of 8 ft. total weight of hull was ??? I don't remember. :(
     
  12. johneck
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    johneck Senior Member

    check this out

    www.ccwbra.com/

    Relative new class that uses 6 HP Evinrude/Johnson 2 stroke outboards as the only allowable power.
     
  13. SamSam
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    SamSam Senior Member

  14. mydauphin
    Joined: Apr 2007
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    mydauphin Senior Member

    I have an 18' foot canoe that will plane at 18knots with 2 relatively overweight guys on it. SO that is 160lb for canoe and engine, and about 400 for OW guys. So 560 lb with 5hp.
     

  15. rubyjeaan
    Joined: Feb 2012
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    rubyjeaan Junior Member

    Racing hydroplanes

    I've built many c-stock, d-stock,and fe class in the 80's and 90's. The boats must be built light, okume ply & okume sticks. Ply is 1/8" max. C-stock will reach a speed of about 70 mph. The FE or formula E will reach 135. Don't know were to find good plans anymore. I quit racing because the Ins. just got to high. Hope this helps...Michael..
     
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