A junk rig for Weaverbird

  • 21 Sep 2016 13:21
    Reply # 4266699 on 3858224

    Yes to glass, or even kevlar, in the form of roving wound around the tube or cloth laid very much on the bias so that the fibres are as circumferential as possible.

    A resounding "no" to carbon used in the same way:

    "Aluminum alloys are extremely vulnerable when they are coupled to a carbon composite. " - https://www.corrosionpedia.com/2/1556/
    corrosion/galvanic-corrosion-of-metals-connected-to-
    carbon-fiber-reinforced-polymers

  • 21 Sep 2016 13:01
    Reply # 4266677 on 4266112
    David Tyler wrote:

    …If I used aluminium battens, I'd certainly want a doubling sleeve. The difficulty is finding a size that will fit…


    or you wind some glass or carbon fibres around the tube where the hinges threaten to overload the structure…
    Last modified: 29 Dec 2016 20:53 | Anonymous member
  • 21 Sep 2016 05:57
    Reply # 4266254 on 3858224
    Deleted user

    That is a great looking rig, David Tyler.  Congratulations and well-done.

  • 21 Sep 2016 04:44
    Reply # 4266112 on 3858224

    I've used, not aluminium, but glassfibre tubes. They are pultruded, with generally longitudinal fibres, but they also have some diagonal fibres to discourage splitting. https://www.carbonfibreprofiles.com/ 

    However, in way of the hinges, I've added a short extra sleeve of 12K carbon braid.

    If I used aluminium battens, I'd certainly want a doubling sleeve. The difficulty is finding a size that will fit tightly over the batten tube, and some machining would probably be needed.

  • 21 Sep 2016 00:09
    Reply # 4265762 on 3858224

    Looks good, David.  Somehow, not as extremely high-aspect as I thought it was.  I'm interested in your batten hinges (I've wondered if I might add them to the lower three battens of my current flat sail).  I've heard that the connecting edges (cut ends) of the alloy battens can crack under load from this sort of hinge.  I guess it is early days for Weaverbird but wonder if you reinforced the battens where you cut them or have any opinion on this?

  • 20 Sep 2016 17:49
    Reply # 4265152 on 3858224

    I now have to hand some photos of Weaverbird at the Kippford junket, and I've put a few of the more flattering ones here.

  • 16 Aug 2016 22:05
    Reply # 4195824 on 3858224

    Bonsoir David

    It seems that you are at sea. Enjoy and have a nice time.

    Eric

  • 16 Aug 2016 07:49
    Reply # 4194750 on 3858224

    Good news -  today is going to be "first sail" day - and if all is well (cross fingers), it’ll go on for a week! I’ve watered ship and put some vittles aboard, almost everything is shipshape, there’s a light SE’ly, the weather is good for several days and I’m heading over to the Scottish coast.

  • 13 Aug 2016 08:19
    Reply # 4188085 on 3858224
    Anonymous member (Administrator)

    Now I looked up Ravenglass Cumbria on Google Maps. There are some quite new photos there from last month, showing, among others, Weaverbird, sitting fairly close to a bridge. 

  • 13 Aug 2016 00:48
    Reply # 4187851 on 3858224
    Poor David - how frustrating for you.  People here in NZ can't believe me when I tell them that sailing from Morecambe Bay is a real commitment, each time you go out.  If you decided you've made a mistake and want to go back home, even if you could sail against the ebb, you'll be lucky if there's any harbour there when you get back!  I reckon the 2 - 3 metre tides we get around Godzone are perfect: enough to add interest and enable you to scrub the boat, but not enough seriously to disrupt things.  Though they can be pretty fast running in places.

    Believe it or not, someone once told me - in all seriousness - that Morecambe Bay is a fabulous cruising ground.  However, for someone like you, David, who is prepared to make an effort, it is a fine base for Ireland, Scotland, Scilly, and many other places.


       " ...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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