Ac72

Discussion in 'All Things Boats & Boating' started by Victory 1, Jun 3, 2013.

  1. Victory 1
    Joined: Jun 2013
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    Location: Hawaiʻi

    Victory 1 New Member

    This is my first post.

    I am not much of a sailboat person, but I like modern boats and materials.

    I saw this video and I was amazed at the ability of these large boats to

    foil.

    I do work with much slower boats - Hawaiian outriggers.

    This summer I plan to build a 25 foot surfing canoe and I WILL be asking advice

    from you more seasoned boat builders on this website.



    http://www.youtube.com/watch?v=a49jy9ba4FQ

    I canʻt get over the hull design too, these hulls look like they are upside down.

    What is the thought process for the bow configuration? Like I mentioned before

    I spend time around canoes and the AC72s look like upside down canoe hulls.
     
  2. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

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

    PAR Yacht Designer/Builder

    "If I had a big enough foil, I could move the earth". In reality, weight versus available power is what determines, if you're going to fly any boat (or earth).

    There are lots of tricks, some subtle, others not so much, that make these puppies get up and scoot at 40 MPH. The dynamics and engineering are extensive, expensive and complex.

    Given enough money, a serious diet and some well thought out foils, you can make anything fly, but don't hold your breath on your Hawaiian outriggers, as they're way too heavy and have assorted other issues, that will negate any practical thoughts, of getting them up on foils.
     
  4. Victory 1
    Joined: Jun 2013
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    Location: Hawaiʻi

    Victory 1 New Member

    How heavy do you think these canoes are? I never considered getting one to foil either.

    I am amazed at the design of the AC72, there must be a lot of stress on the entire hull and especially

    where the "foil" legs(I donʻt know what these are actually called) attach to the hull.

    Also, why and when did the sails get "squared" off on the top?
     
  5. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Yes, these boats are highly loaded and there are lots of areas on the hulls and rig that are very highly loaded. Square top mains, are a natural evolution as a result of new materials, engineering and the desired for more area, in a location where it's most useful.
     

  6. Victory 1
    Joined: Jun 2013
    Posts: 3
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    Location: Hawaiʻi

    Victory 1 New Member

    I love new technology and modern materials.

    Although Hawaiian canoes are ancient by design,

    There has been new designs brought forward due to new materials.

    I do not prefer monohulls over multihulls in AC racing, I just like

    The design advances and building techniques involed.

    How about all the livery all over those AC "boats"? I think a single one cost

    More than everything I own.
     
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