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Converting a Westerly Nimrod to Junk Rig

  • 17 Jan 2017 13:36
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    Reply # 4552517 on 4550835
    Anonymous member

    This is just what I have been thinking so far. The tabernacle is also needed in order to save the easy trailerability (easy mast dropping/lifting) of the boat.

    Last modified: 17 Jan 2017 13:37 | Anonymous member
  • 17 Jan 2017 13:29
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    Reply # 4552514 on 4550835
    Deleted user

    Preserving the buoyancy tanks can also be done by using a tabernacle instead stepping the mast to the hull.  Put in the tabernacle, and seal around it.  No hole on deck, no holes in the tank.  I'd put an inspection port somewhere on the tank to check on things every once in a while, though.
  • 17 Jan 2017 13:18
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    Reply # 4552506 on 4550835
    Anonymous member

    David and Jami,
    There are two ways in which the lower end of the mast can be moved aft to avoid your buoyancy tanks:

    1. Give the mast some forward rake. This is very desirable in the low AR rigs such as the Reddish and the fantail planforms.
    2. Use a high AR, like my rig for Weaverbird, which naturally puts the whole mast further aft.
    I recently made a sail of 13 sq m for JRA member Martin Norris, who is building a YM Senior (16ft) in Cockermouth. It's a scaled down weaverbird sail, and as such might be used on either of your boats.

    David, I don't think the Reddish rig is fitting very well on your Nimrod. I think that sheeting will be troublesome. In the rig I designed for Fantail, I fixed this by finding a way to make the leech straight.
  • 17 Jan 2017 11:50
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    Reply # 4552374 on 4550835
    Anonymous member

    Hello David,

    it seems that your conversion will be very much like mine: I'm starting a conversion of a 17ft trailer sailer JOE 17 (a finnish design), and this boat also has a boyancy tank at the forepeak (which I would like to keep, even if I have to bury the mast step there).

    I'll be spying on you, and if my project helps you at the same time, even better :)

    Jami
  • 16 Jan 2017 21:09
    Quote
    Reply # 4551373 on 4551161
    Anonymous member
    Treasurer JRA wrote:

    Annie

    I believe you may be referring to the Westerly Nomad?

    Bill Churchouse's boat is a Westerly 22, very similar to the Nomad (and quite similar to the Westcoaster).

    Chris

    Ah, yes, you are quite right as usual, Chris.  Just had a look at the Nimrod, but I have to say it still looks pretty cute, although I might hesitate to take it to the Azores!
  • 16 Jan 2017 19:31
    Quote
    Reply # 4551161 on 4550835
    Anonymous

    Annie

    I believe you may be referring to the Westerly Nomad?

    Bill Churchouse's boat is a Westerly 22, very similar to the Nomad (and quite similar to the Westcoaster).

    Chris

    Last modified: 16 Jan 2017 19:35 | Anonymous
  • 16 Jan 2017 19:10
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    Reply # 4551153 on 4550835
    Anonymous member

    A Westerly Nimrod!  i love these little boats.  There's one been entered in just about every Jester Challenge so I would guess that they're as good as I thought they were.  I'm really looking forward to seeing how this project turns out.  Weclome aboard, David!
  • 16 Jan 2017 17:04
    Quote
    Message # 4550835
    Anonymous

    Posts moved from Introductions thread.

    David's original post:

    Hello, I'm David - Very recently joined the JRA. Based in Cumbria, I've sailed quite a lot in Lug rigged boats that also have unstayed masts, but not yet sailed a junk rigged boat.

    I am very excited about being a member and also wish to convert my Westerly Nimrod trailer sailor to junk rig. As a starting point I have superimposed the Reddish (chosen because shortest mast) sail plan onto a drawing of my boat and I think it looks very attractive. I would really appreciate if someone could tell me if it will actually work! I don't know how to calculate the CE on a sail that shape and will also appreciate advice about stepping the mast. Below where the new mast will go is a buoyancy tank so I'll probably have to cut through that.  I look forward to hearing from and meeting with other members.

    Last modified: 16 Jan 2017 17:11 | Anonymous
  • 16 Jan 2017 16:58
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    Reply # 4550834 on 4550835
    Anonymous

    OK David, those look good.

    Looks like you have a sail area of around 190 sq ft, compared to 140 for the Bermudan rig. About a 35% increase - could be a bit smaller, but I'm sure a certain Norwegian will disagree!

    You haven't left much room aft for sheeting - that might be a problem.

    I have marked the Centre of Area here, lead is about 5.5% of waterline, PJR recommends around 9% but I'm not sure this is critical.

    Shorter battens would resolve all these issues if they are such - I leave it to those rather more experienced than me to comment.

    Chris

    Moved reply from Introduction: 16 Jan 2017 17:06
  • 16 Jan 2017 15:39
    Quote
    Reply # 4550760 on 4550835
    Anonymous member

    Many thanks for your help, Chris. I have now put 2 drawings in an album on my profile page, so I hope that works now for others to see. David

    Moved reply from Introduction: 16 Jan 2017 17:07
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
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