Concept to basic line drawings - 40 foot power boat

Discussion in 'Boat Design' started by 67-LS1, Sep 6, 2003.

  1. dougfrolich
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    dougfrolich Senior Member

    Hey Dennis,

    I posted some renderings of the LS1? I can almost see you bombing up the river!

    Doug Frolich
     

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  2. Dim
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    Dim Senior Member

    It's very good work, Doug. Nice!

    Dim.
     
  3. duluthboats
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    duluthboats Senior Dreamer

    Doug,

    I just looked in the gallery, very nice and quick to.

    Gary :D
     
  4. 67-LS1
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    67-LS1 Junior Member

    Doug,
    All I can say is WOW!
    You got this from my drawings? You have absolutely nailed it!
    I can also see myself bombing up the river!
    WOW!
    Dennis
     
  5. dougfrolich
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    dougfrolich Senior Member

    Dennis,

    I am pleased you like the renderings! I was wondering how flexible you are regarding the engine placement. The issue is getting the CG far enough aft for the target speed. Here is one more shot-- this will be good for the wall.

    Doug Frolich
    Marshall Yacht Design
    Larkspur, Ca.
     

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  6. 67-LS1
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    67-LS1 Junior Member

    Doug,
    I was hoping that the notched transom ( notched enough to keep the props of 42" long Arneson ASD-8's under the swim platform! ) would shorten the running surface and help move the CG aft. Maybe not enough?
    Dennis
     
  7. Guest

    Guest Guest

    Dennis,

    You also have the option of placing a swim platform on the transom 24"-32" or so Back. This would make the length of your notch substantially less. Moving the arnesons closer to the back of the boat, and the props will tuck well underneath the swim platform as not to be a safety hazard during boarding\exit off of the platform.

    Ken
     
  8. gonzo
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    gonzo Senior Member

    Have you considered CAL-500 drives instead. They are much cheaper than an Arneson. There is a model without trim with tillers that is lighter too.
     
  9. 67-LS1
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    67-LS1 Junior Member

    Ken,
    I would like a traditional wood swim platform. I was thinking that the size of the notch would help with the CG problem. Just a thought. I think I'll try to add detail to my cutaway drawing to see how far aft the engines can be moved which should better indicate if and how much of a notch is needed.

    Gonzo,
    I have not seen the Cal500 drive. I'll surf around and see if I can find some info.

    Dennis
     
  10. gonzo
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    gonzo Senior Member

    The CAL-500 is built by Sonny Miller. He is a retired racer and use to set up Formulas, Cary and other high performance boats. His phone number is: 954-257-2284 and 229-776-8831.
     
  11. 67-LS1
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    67-LS1 Junior Member

    I looked at the CAL-500 drive. I prefer the Arneson model for it's ability to steer and trim. I haven't gotten prices on the Arneson ASD-8's, but the CAL-500's at $10k plus each are not inexpensive.
    I'll let you know what I get quoted on the Arneson's.
    Dennis
     
  12. gonzo
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    gonzo Senior Member

    By cheaper I didn't mean inexpensive. We all wish:) . When you compare prices, see also the difference in weigh. Another difference is that Arneson drives need a hydraulic servo pump, lines and hydraulic control valves. It all costs money and makes the system heavier. However, if you absolutely need them to trim, Arneson is your choice.
     
  13. dougfrolich
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    dougfrolich Senior Member

    Dennis,
    I would recomend this drive, I think it is more appropriate for the intended speed range, less complex installation, and less expensive.

    Doug
     

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  14. gonzo
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    gonzo Senior Member

    What kind of a drive is it and who sells and services them?
     

  15. dougfrolich
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    dougfrolich Senior Member

    Gonzo,

    More info on the drive above can be found at dbdmarine.com.

    Doug
     
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