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A 7 metre variant of SibLim

  • 09 Dec 2018 14:50
    Quote
    Reply # 6951860 on 6951800
    Anonymous member
    Gary wrote: Hmmm,

    a 23 foot boat from UK to NZ

    You sure about that ?

    Maybe I am just getting old (well OK I am) but I am thinking that might be marginal.

    Perhaps not, I dunno.

    Yes, in the hands of a Prudent Mariner. There's plenty of previous form on this- Trekka, for example. All the talk about southern ocean rollovers got me thinking about how, or whether, this boat could be made ocean-ready. I think it could, with a Mingming-style hinged companionway hatch that could be dogged shut and watertight.The deck is in the right kind of shape, approaching a whaleback form so that water is shed quickly and inverted stability is minimised. That central part of the deck could  even be higher, to further improve that feature, along the lines of the RNLI lifeboats that have high superstructures to make them self-right rapidly. For resistance to knockdown, I think you either go for a deep keel for maximum righting moment, or shoal draught so that you skid down the breaking waves, as catamarans should do, without tripping up, and this design goes the latter way. Carrying capacity is enough for a singlehander to make the long hauls from Canaries to the Windies and from Panama to the Tuamotus.
  • 09 Dec 2018 12:33
    Quote
    Reply # 6951804 on 6951800
    Anonymous member
    Gary Pearce wrote: 
    Hmmm,

    a 23 foot boat from UK to NZ

    You sure about that ?

    well, things like that have been done…

    there was a german family who made the trip around the globe with an 'etap 21'. young andreas (3 years old at departure) enjoyed standing headroom for the first part of the voyage…

    ueli

    Last modified: 09 Dec 2018 12:34 | Anonymous member
  • 09 Dec 2018 11:18
    Quote
    Reply # 6951800 on 6950605
    Anonymous member



    Daivd 

    Although I have a boat waiting for me in NZ, the idea of a kit to build and get me to NZ is very enticing.   I actually have a set of Wharram plans sat on my coffee table but SibLim 7m......

    Peter

    Hmmm,

    a 23 foot boat from UK to NZ

    You sure about that ?

    Maybe I am just getting old (well OK I am) but I am thinking that might be marginal.

    Perhaps not, I dunno.
  • 08 Dec 2018 17:09
    Quote
    Reply # 6951209 on 6010674
    Anonymous member

    Bilgeboard cases, end posts glued in place. In the model, these are 25.5 x 8mm, at full size 109 x 34mm.

    1 file
  • 08 Dec 2018 14:06
    Quote
    Reply # 6951075 on 6010674
    Anonymous member

    Bearers to support berth locker lids.

    Floor at stn 4.

    Floor at stn 6.

    These two floors are to support the bottom hull panel.

    Forehatch framing completed and forecabin headlining added.

    At full size, thick sheets of MDF would now be put on top of both headlinings, so that they can be walked on.
    4 files
    Last modified: 08 Dec 2018 14:16 | Anonymous member
  • 08 Dec 2018 04:13
    Quote
    Reply # 6950605 on 6949499
    Anonymous member
    Anonymous wrote:
    David wrote:

    This is looking great David. Your photos are starting to pique my interest for the next boat. I am actually enjoying building my catamaran, it is good to have a project and something to make me spend spare time creatively, so I think there will be a 'next' boat when this one is finished. I like the idea of all plywood construction. Following with interest!

    Wow, you're going to be a serial boatbuilder? Well, by the time you've finished the Eco 6, the drawings and design of the SibLim 7 should be proven, and ready for you to come back into the monohull camp :-)

    As indeed they will be ready for all JRA members who are looking for a creative project.

    I see that I've spent 16 days on the setup so far (about a couple of hours for each session).  At full size, I think it would be reasonable to expect to get to the same stage within about a month of full days of work, considering that it would be sensible to epoxy coat the pieces before assembly.

    Who else is following with interest?


    Daivd 

    Although I have a boat waiting for me in NZ, the idea of a kit to build and get me to NZ is very enticing.   I actually have a set of Wharram plans sat on my coffee table but SibLim 7m......

    Peter
  • 07 Dec 2018 20:17
    Quote
    Reply # 6950233 on 6010674
    Anonymous member

    Hi David,

    This seems to be a very fast way to build a boat. There are a lot of people claiming

    their way to build is the quickest, this is for all to see. Thanks for showing.

    Rudolf
  • 07 Dec 2018 16:55
    Quote
    Reply # 6949917 on 6949788
    Anonymous member
    Anonymous wrote:

    A closeup of the slot, tab and wedge arrangement - this is an excellent, quick and easy way of assembling a plywood boat.

    These tabs do not have to be a part of sheet. A tab could be screwed on the side of the sheet and removed after gluing the opposite side. The tab (and wedge) could even be steel. This would appear to save on wastage though the last boat I cut out had lots of waste just due to curves. I guess if adding a tab saves another scarf it would be worth while. Even on a build that is not precut like this, adding tabs like this where long clamps are not viable or available is a great idea.

    Over all, this looks like a great way to build for speed. I am guessing that the cost of cutting is offset by the speed and ease of building.
  • 07 Dec 2018 15:53
    Quote
    Reply # 6949788 on 6010674
    Anonymous member

    Cockpit seats and transom glued, wedged, cable tied and filleted in place.

    A closeup of the slot, tab and wedge arrangement - this is an excellent, quick and easy way of assembling a plywood boat.

    2 files
  • 07 Dec 2018 08:53
    Quote
    Reply # 6949499 on 6949355
    Anonymous member
    David wrote:

    This is looking great David. Your photos are starting to pique my interest for the next boat. I am actually enjoying building my catamaran, it is good to have a project and something to make me spend spare time creatively, so I think there will be a 'next' boat when this one is finished. I like the idea of all plywood construction. Following with interest!

    Wow, you're going to be a serial boatbuilder? Well, by the time you've finished the Eco 6, the drawings and design of the SibLim 7 should be proven, and ready for you to come back into the monohull camp :-)

    As indeed they will be ready for all JRA members who are looking for a creative project.

    I see that I've spent 16 days on the setup so far (about a couple of hours for each session).  At full size, I think it would be reasonable to expect to get to the same stage within about a month of full days of work, considering that it would be sensible to epoxy coat the pieces before assembly.

    Who else is following with interest?


    Last modified: 07 Dec 2018 09:43 | Anonymous member
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