Design Thoughts

Discussion in 'Boat Design' started by benha, Sep 21, 2016.

  1. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    I/Os and outboards are dangerous for divers. Inboards are the usual setup.
     
  2. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    Outboards rule these days.
     
  3. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    Typical abalone divers rig, cat around 7.5m
     

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  4. philSweet
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    Location: Beaufort, SC and H'ville, NC

    philSweet Senior Member

  5. benha
    Joined: Oct 2011
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    benha Junior Member

    Clearly an I/O would be great for layout, but I'm not a fan. Not only does it have "boat sinking" implications in that you're relying on an articulating bellows seal to keep water out of your boat, but it's also the only configuration that involves running the power train itself through a knuckle. If I were to build an inboard I'd use a v-drive transmission to push the engine rearward, but for me the only good options are "real" inboard or outboard...

    I've seen a couple of shamrocks around. Nice boats. Part of this is that I'm looking for a boat building project though. I could try to find one to pull lines and layout from one and mimick it, but that might prove challenging. Not a lot of those things around in these parts.
     
  6. Barry
    Joined: Mar 2002
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    Barry Senior Member

    I am pretty sure that even if the bellows cracks, water will not get into the boat. At least with Volvo
     

  7. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    Agreed, if you're not willing to do reasonable maintenance, you can't blame the design. By this I simply mean there are countless tens of thousands of I/O drives still floating, some with leaking bellows and all. I see boats all the time with over 20 year old transom kits on them, when I do the replacement.
     
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