SJR files tidied up.

  • 08 Aug 2026 10:53
    Reply # 13664156 on 13660511

    Hi Slieve - I am looking for more detail of the simpler, "Mk2" version of the SJR as described by Paul Gardham in his video on the JRA You Tube channel, "Split Junk Rig: Explaining the Junk Rig (6)"

    I have read your original set of files before the new combined version.

    On re-reading your revised version of the file I note the comments about having 5 parallelogram panels and two tapered, rather than 4 and 3, plus a few extra notes about the size and shape of the panels forward of the mast, which i presume Paul used in drawing his sail. But what I was hoping for was a new rig diagram, giving measurements, batten lengths and angles etc. which I could then scale for my boat (Rowan Crown 24).

    Given the info in your paper, it would be possible for me to have a stab at it myself but I would worry about whether or not I'd put enough convexity (if there's such a word) in the luff and leech, how long to make the yard by comparison with the parallel battens, how long to make the first batten etc.

    Do you have any more specific info on the "Mk2" rig?

    Many thanks,

    Roger.

    Last modified: 08 Aug 2026 11:39 | Anonymous member
  • 03 Aug 2026 00:10
    Reply # 13660891 on 13660511
    Steady as she goes. Everything is OK.


  • 02 Aug 2026 22:43
    Reply # 13660862 on 13660511

    Batten pockets! 

    Yes, David, that is my present headache.

    At the moment I am trying to write about the method I've used in the most recent builds which seems to work well, but there are too many distractions, and I seem to have writer's cramp. Perhaps I'm trying to include too much detail, but some readers have a lot of experience and some will have very little or none.  I struggle with the balance. I'll try again tomorrow.

    Cheers, Slieve.

  • 02 Aug 2026 19:31
    Reply # 13660795 on 13660511

    Congratulations to Slieve and James - this single file, 

    https://junkrigassociation.org/resources/Documents/Slieve's%20Files/

    Split%20Junk%20Rig%20Draft%20Notes%202009%2030-07-2026.pdf 

    is now much clearer and easier to read and understand than the various separate files were. There are still some sections to be completed, but most of the content that a would-be builder needs is there. There are a few unimportant typos, that a proofreader will pick up easily.

    There is only one item of content that I would like to comment on, at this stage. If I might be permitted to misquote Jane Austen:

    "It is a truth that ought to be universally acknowledged that when a straight batten is to be attached to the edge of a cambered panel, then the edge of that panel should also be straight."

    This applies whether the camber is added by broadseam, or tucks or darts. What it means in practice is that the edges of each cloth, in the case of vertical cloths and broadseams, or the edge in between darts, in the case of a panel cut from a single cloth, should be straight (not curved, as is the case with Arne’s round-only cut).

    If this is done, the attachment of batten pockets by “method b” or (my preference) “method c”  gets a lot easier, and there is no downside in terms of the appearance and function.

  • 02 Aug 2026 13:42
    Reply # 13660680 on 13660511
  • 01 Aug 2026 20:55
    Message # 13660511

    With the help of James Gray, webmaster, I have replaced the bits and pieces of the original and incomplete draft notes on the first SJR. Most of the new file is simply the old files joined together in some sort of order, but there are a few new bits which I found on my computer, and it is still incomplete. 

    The write up with the latest and greatest is still a work in progress, and the first section should appear in the not to distant future. This should be of use to members who have some sail making experience, but the second section hopefully should be of some use to those with less experience. The photos and captions will be included somewhere.

    Cheers, Slieve.