outboard yacht

Discussion in 'Boat Design' started by diego1, Aug 10, 2011.

  1. diego1
    Joined: Aug 2011
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Peru

    diego1 New Member

    I was planning to build a yacht, possibly a sport fisher or a power catamaran. The only problem is that her is king of difficult to install an iboard engine do yo know if it is possible to intall multiple outboard motors on a yacht (sportfish or cat...) between 45 and 65 feet long. COuld you put links and examples if you got.

    Thanks.:)
     
  2. FMS
    Joined: Jul 2011
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    Location: united states

    FMS Senior Member

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

    PAR Yacht Designer/Builder

    Why is it difficult to install inboards in Peru? How about out drives? Two 550 HP diesel out drives on an Intrepid would be much more economical and probably faster without the extra two legs dragging in the water. The Mercury 275's are 20k apiece, before controls, so that's 80k. I can pick up two 500 HP Cummins right now for about 50.
     
  4. Squidly-Diddly
    Joined: Sep 2007
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    Location: SF bay

    Squidly-Diddly Senior Member

    isn't the main feature of the Intrepid 47 that you easily go on

    less than all four motors and trim the others up out of the water?

    The first story said something about 'cruising at 50+ or fishing at 0.8 gph'.

    I assume the 0.8gph is on one motor.

    Wouldn't the Speed VS GPH spreadsheet for the Intrepid 47 need a few more pages, for various combos of # of motors in the water?

    What would be better, two inner motors or just two outer motors?
     
    1 person likes this.

  5. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    What would be better is the dramatically reduced drag of a single drive leg of the HP required to hit their target S/L. Having 4 legs in the water is just silly. On a vessel this size 2 can be justified and one is the optimum.
     
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