Modern Version: Maxi 77

Discussion in 'Boat Design' started by Heinrich Poigner, Jul 2, 2018.

  1. Heinrich Poigner
    Joined: Jul 2018
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    Heinrich Poigner (He likes boats(and maths))

    Hello,
    This is my first post to this lovly page (tho I've been readig allong for a bit)
    Does it seam like a reasonable idea to design a modern version of the Maxi 77?
    I meen by keping the basik shapes and "cutting away" half the weight.
    obwiosly that would lead to a horrible boat in itsself.
    The core of the question probably boils down to if that kind of hull design with its "overhangs"(?) on the siedes makes any sense?
    I'm sorry if this was already dicussed, I was unable to fine a thread on it.
     
  2. bajansailor
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    bajansailor Marine Surveyor

  3. Heinrich Poigner
    Joined: Jul 2018
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    Heinrich Poigner (He likes boats(and maths))

    Jea.. thanks for pointing out that gaping information hole.
    I'm sorry to not having included enough info
    Yes I meant the one by Pelle Petersen

    This is the best I've found till now:
    https://maxiowners.net/wp-content/uploads/2015/08/maxi_pbo_589_2015.pdf
    (I think it's a bit too glorifying)

    Oh and if someone knows a good picture of its crosssection or if there is a name to those sidewards "overhangs"...
    I didn't manage to find either of those ...
     
    Last edited: Jul 3, 2018
  4. Heinrich Poigner
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    Heinrich Poigner (He likes boats(and maths))

    Chines1.jpg
    the boat has chines with a horizontal part right after like in the img above
    but the rest of the hull is curved.
    also the chines are only dominantly shown in the middle of the boat (~25-75% LWL) (chines are almost exactly on the waterline and don't rise)

    Is that a reasonable feature in a sailboat or is it only there to get more space in some way?
    Are they worth consideration and testing or are they just wasted space?
    Are they correlated to the good sailing qualities of the 77?
     
  5. HJS
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    HJS Member

    This chine - step was for attaching the inner liner.
     
  6. Heinrich Poigner
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    Heinrich Poigner (He likes boats(and maths))

    I'm somewhat confused!?
    Why would that result in a 10cm step?
    Was that common? Why not anymore then?
     
  7. HJS
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    HJS Member

    This is not a result but a solution to a need. It was an easy way to place the inner line where they wanted it. It was a simply simplification in the production.
    That was what Pelle P told us when we asked him.
     
    Last edited: Jul 4, 2018
  8. Heinrich Poigner
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    Heinrich Poigner (He likes boats(and maths))

    So would it have been a better boat if instead of that step it would have a mor conventional chine or a U-profile?
    Or should the topsides be more inwards to kombat the high spability in light winds?
     

  9. philSweet
    Joined: May 2008
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    philSweet Senior Member

    As far as making it lighter, no, I don't see that as a good thing. It looks a bit too light as it is. Compare to a Cal 25, which is older, 500 pounds heavier, 6" shorter, a tad narrower, and rated a fair bit faster.

    Those chines aren't good or bad. But they are fussy to get right from a design standpoint, and also fussier to sail well. They add roll damping, especially when the ballast is as low as it is in the MAXI 77. I agree with HJS that it is probably primarily a manufacturing convenience, facilitating liner location and a good bond where it is most needed. If building a one-off, there is no reason to do that.
     
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