shallow water, outboard surface porpelle.

Discussion in 'Surface Drives' started by Gian Milan, Jul 11, 2011.

  1. Gian Milan

    Gian Milan Previous Member

    Hello everyone.
    I'm Gian, Italy.
    I want build a Shallow Water Boat and I designed what is in attachment.
    Is a boat in meters, long 5.5, wide 1.7, and 0.8 high.
    The rivers have absolutely no waves, are slow, with gravel.

    The boat, fully loaded weighs 650 Kg and fishing 0.1 meters, has to consume little and do not need to run.
    I would like to apply outboard (height adjustment with piston air).

    What can I bow?
    According to the tunnel you can make the effect of the demos that are here? http://www.flatscat.com/performance1.htm

    Ciao a tutti!
     

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  2. Frosty

    Frosty Previous Member


    I like it--what engine will you use?
     
  3. Gian Milan

    Gian Milan Previous Member

    For this I asked you opinion...in My opinion a Mercury 40/60 may be ok.
    Some idea about the bow mount?
     
  4. Gian Milan

    Gian Milan Previous Member

    For this I asked you opinion...in My opinion a Mercury 40/60 may be ok.
    Some idea about the surface propeller to mount?
     
  5. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    That design will make the boat draw more (sink deeper). A flat bottom boat will have less draft.
     
  6. keysdisease
    Joined: Mar 2006
    Posts: 794
    Likes: 43, Points: 28, Legacy Rep: 324
    Location: South Florida USA

    keysdisease Senior Member

    Tunnel hulls

    Yor concept is valid, and proven by ultra shallow running flats fishing boats in the States. The tunnel may make the boat draw a little more water at rest but will allow you to run shallower.

    Take a look here:

    http://www.fishnetdailynews.com/Archived/FishNetTunnelHull.htm

    and other places using search terms: flats boats tunnel hull

    If you don't need to plane than a there is no getting around a flat bottom as drawing the least amount of water.

    Steve




     

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  7. Gian Milan

    Gian Milan Previous Member

    Sure, Gonzo.
    But with a flat boat I can't install a jet.
    If a propeller (in or outboard engine) is installed, it must be under the keel.
    Or not?
    TU
    Gian
     
  8. Gian Milan

    Gian Milan Previous Member

    My question is:
    the propeller, positioned at the end of tunnel, can be higher than the keel?
     

  9. gonzo
    Joined: Aug 2002
    Posts: 15,129
    Likes: 900, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    If you install a jet, a flat bottom is a requirement. At least on the aft end.
     
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