GW38 Soft Wing Junk

  • 25 Aug 2016 22:23
    Reply # 4210992 on 4204622
    Dear David - you know I never eat chicken!

    Seriously though, I have thought about all this and discussed it with Kevin.  However, as the boat needs to go on its keel and, somehow, get itself onto a cradle before being launched, we concluded that turn over would be the time to get all the ducks in a row.  The strongback has to come out (Rob and Maren are wanting to make a raised vegetable garden) and I would like the hull to end up a little further into the shed.  Yes, it involves hiring a crane, but I would have had to do that eventually, for fitting the keel, because there is no travel lift here.

  • 25 Aug 2016 10:20
    Reply # 4209924 on 4208752
    Annie Hill wrote:Gosh - but that's a big boat.  It makes my little SibLim seem a lot less daunting.  What an ingenious way to turn over the hull.  I think I will just get a crane to do it for me!  But Garth's method would be cheaper.  I don't reckon my shed would be up to it, however, and suspect this is something that should be planned from the word go.
    Annie, I think I remember mentioning Garth's turnover method to you, and recommending it. To use a crane would involve dragging the hull out of the shed, then dragging it back again. You're right, using a line to the roof would probably place too much load on the shed - so hire two engine hoists, one for each end. Just think in terms of a chicken on a rotisserie, and then substitute Siblim for the chicken... 

    Even if you don't hit the vertical CG spot on, for the pivots, the effort needed to spin the hull and control the spin won't be more than can be supplied by tackles.

  • 25 Aug 2016 01:30
    Reply # 4208950 on 4204622

    Planned from the word go... Not really.

    Originally the plan was to carry the hull outside and roll it over with 50 of my closest friends and a boom truck.  I had serious misgivings about that plan, the danger to people and boat seemed high, so when I realized that by controlling the pivot axis I would only need to modify one roof truss I went for it.  Ironically, the engine hoist, which made it all possible, was sitting around in the shop temporarily because a friend moved into an apartment.  There was also a fairly detailed weight and center calculation involved which must have been accurate as the rolling force was quite low.

  • 24 Aug 2016 22:26
    Reply # 4208752 on 4204622
    Gosh - but that's a big boat.  It makes my little SibLim seem a lot less daunting.  What an ingenious way to turn over the hull.  I think I will just get a crane to do it for me!  But Garth's method would be cheaper.  I don't reckon my shed would be up to it, however, and suspect this is something that should be planned from the word go.
  • 23 Aug 2016 08:42
    Reply # 4205091 on 4204622

    I sailed into Eagle Harbor and visited Garth and Wendy, when the GW38 hull was still upside down and being glassed. I was impressed then, and I'm more impressed now. This is one of the more innovative design and build projects that you're ever likely to see. 

    If anyone can surmount the engineering challenges of making a big soft wing sail, it's Garth, with his day job being a senior naval architect at a large marine design company; but I would guess that the sailplan design is going to go through a few iterations before it's built, and then a few more during building. And then a few more during sailing trials. It's a tough nut to crack, and I hope you can do better than I managed to do with Tystie, Garth.

  • 23 Aug 2016 06:32
    Reply # 4204849 on 4204622

    ... and Annie was quite right!  Thank you very much for letting us see your pictures Garth, which are full of interesting and original ideas.  Please keep us posted as work goes on. I'm also enjoying your book, which I was able to get from Amazon UK.

  • 23 Aug 2016 01:32
    Message # 4204622

    At Annie's insistence that people would be interested, I have posted some boat building pictures in my photo album.

    The design is shown in the second album. It will be a shallow hull with a lifting keel and rudder.  The plan is for a soft wing rig as shown but at this point I am focused on the interior structure.  Its been three years so far.  I don't have an estimated completion date.

    Comments/questions are welcome.

       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

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