hydroplanes

Discussion in 'Boat Design' started by andyman54, Jul 10, 2012.

  1. andyman54
    Joined: Jul 2012
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    Location: georgia

    andyman54 New Member

    Ok i have been trying to figure out which boat would work best with a 10hp or 15hp engine. I plan on going to lake lanier with whichever boat i get and occasionally catching some waves from other boats wake. Would it be extremly bad to do that with a 10' tunnel mite? https://www.boatdesigns.com/10-Tunnel-Mite-tunnel-hull/products/369/

    or do i want to get a TNT? https://www.boatdesigns.com/11-TNT-runabout/products/365/

    OR do you guys have any other boats in mind that are easy to build? I want to be able to go at least 36mph i weigh 135

    thanks
    Andy
     
  2. Don H
    Joined: Apr 2012
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    Location: Queensland Australia

    Don H Junior Member

    2 very different boats.The little tunnel hull will be the most stable of the 2.
    The tunnel will probably be fastest with the same HP although it will take more setting up for prop size, Engine height and weight distribution in the boat.

    The TNT although mentioned as a V hull looks very flat in the photo so it will slam through the waves when the tunnel would have been much smoother.The tunnel will turn quicker, the TNT probably half slides around corners with such a shallow v angle
    The TNT has 15hp in the spec but the photos have a 25hp on the back. Im am guessing they did this as a 15 wasn't enough grunt to get it over its own bow wave. The tunnel looks like it allows you to shift your weight easier to trim the boat.
    It would be nice if the tunnel was a little longer but thats the one i'd pick.
    Don
     
  3. andyman54
    Joined: Jul 2012
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    andyman54 New Member

    Do you recommend any other boats?
     
  4. messabout
    Joined: Jan 2006
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    Location: Lakeland Fl USA

    messabout Senior Member

    Andy, if your aim is to jump wakes, then a jetski will be a better prospect. A decent hydro needs to be built light if you intend for it to go fast. Light weight, fast boat, and bouncing off wakes is not a good combination.

    If you get a jetski or other boat for the jumping bit, you will make yourself unpopular on Lake Lanier. You could probably better get away with that behavior on West Point Lake.
     
  5. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    TNT scoots fine with a 15 HP, assuming a reasonable weight driver. It turns like typical early warp bottom designs and is smoother in them than a Tunnel Mite, which tends to "crab" around in high speed turns. At lower speeds the tunnel will grab and "carve" well.

    For wave hopping you're going to want a fairly steep deadrise, in part to dissipate slamming loads. Look for boats with more than 15 degrees of deadrise for jumping wakes and waves.
     
  6. Jimboat
    Joined: Feb 2002
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    Location: Canada

    Jimboat Senior Member

    Andy - the Tunnelmite is a good boat. you'd like the fun of a tunnel hull. you may have a challenge getting to 36mph with 10-15hp with either of these designs, though.
     

  7. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    35 MPH may be possible in a 15 HP equipped TNT, with a 135 pound skipper. 35 MPH is screaming along pretty good in one of this and you really don't want to go much faster. I don't think 35 MPH is possible in a TunnelMite with a 15 HP. I'm not sure what's it's rated for, but worth a look see.
     
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