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67860Re: [bolger] Re: Logical leap to multihulls? (was SketchUp Chebacco)

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  • Tom Pee
    May 17, 2012
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      Good post, just want to reinforce the idea... MAKE IT LONGER if you need more room.

      From: Harry James <welshman@...>
      To: bolger@yahoogroups.com
      Sent: Wednesday, May 16, 2012 12:13 AM
      Subject: Re: [bolger] Re: Logical leap to multihulls? (was SketchUp Chebacco)

      Well said John


      On 5/15/2012 7:58 PM, John Kohnen wrote:
      > Bolger's sharpies are actually pretty narrow, and depend on high freeboard
      > and buoyancy up high for secondary stability. A narrow boat, even if
      > flat-bottomed, will "give" a bit in waves -- the waterline won't quickly
      > conform to the face of a wave, giving a more comfortable and safer ride in
      > rough weather. This is completely opposite of the behavior of a fat
      > flat-bottom boat, which will roll quickly to the angle of a wave, and will
      > be more likely to be rolled over by a large wave. Multihulls are in effect
      > very, very fat and have huge initial stability. They don't tip over
      > easily, though the ride probably gets pretty rough, until they do...
      > Multihulls have proven themselves seaworthy enough for most passages, so
      > the choice between them and monohulls is largely personal preference, but
      > Bolger's sharpies are really pretty far from multihulls and it's by no
      > means a logical progression to get to multihulls from them.
      > Modern ocean racers have gotten wider, shallower and squarer in section to
      > carry lots of sail and plane along at phenomenal speeds, but this isn't a
      > suitable trend to follow for pleasure boats, where comfort and
      > seaworthiness should be most important. Increasing the beam of one of
      > Bolger's sharpies would actually make it _less_ seaworthy. If one needs
      > more room in a Bolger sharpie they should build a longer one.
      > On Tue, 15 May 2012 09:59:43 -0700, Stefan T wrote:
      >> One of the logics our movement has pushed is toward wider beam and
      >> squarer cross sections to get shallower draft for greater speed,
      >> comfort, and ultimately less-sinkable safety.
      >> Take Phil's sharpies and extend the beam even further to 10 or fifteen
      >> feet and what do you have? The beam and draft of a multihull....

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