New sail for Siskin

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  • 16 May 2021 06:41
    Reply # 10510507 on 10509351

    Regarding keeping the sail close to the mast while hoisting and lowering, I've got quick release fittings on all of my parrel-downhauls (its a trailer boat and the rig has to be dismantled each tme), and a secondary benefit of this is that the fittings prevent the running parrels from running out more than just a few centimetres. These, together with the standing parrel on the yard (which is just a bit of string tied on) mean that you can hoist or lower the sail, it never goes far from the mast, and one only needs to tweak the running parrel-downhauls at leisure. The whole rig is very manageable, I think (Paul) we are on pretty much the same page here.

  • 16 May 2021 05:46
    Reply # 10510237 on 10509351

    Ah I forgot,

    like Graeme I too have fixed parrels on the yard, top and bottom battens.

    They’re lengths of tubular webbing just tied on, they keep the sail under control whilst hoisting and lowering.

  • 16 May 2021 00:46
    Reply # 10509705 on 10509351

    I concur with Paul, if you get the sling point right and with a little bit of "fiddling" you won't need a throat-hauling parrel - in fact I would go further.

    On Serendipity I have recently added a fixed parrel for the yard and another for the boom, but the only running gear needed is just the halyard and the two paired spanned parrel-downhauls as used by Slieve.

    It seemed a mess at first, but with a little tuning the sail now sets well with just the above running gear. For some reason, mine seems to set happily with the main luffs in line with the aft edge of the mast.

    However, Its all very much related to the geometric profile of the sail itself - I copied Amiina's exactly, and it looks as though Paul has too. Yours looks similar, but I can't see if it is an exact geometric copy or not.

    Your sail looks to have fairly small amount of camber. I am interested to know: what is the calculated amount of camber you have built into the jibs and main panels, and what is the sheeting angle of the jibs? Thanks.

    Last modified: 16 May 2021 00:54 | Anonymous member
  • 15 May 2021 23:23
    Reply # 10509562 on 10509351

    Hi Antoine,

    I see from your profile that your previous sail was flat panels.

    If you haven’t already tried the new sail you’re in for a surprise heehee..

    It looks to me that you may have the sling point on the yard a little too far aft - this would account both for the luff of your top main panel being forward of the mast, and for the diagonal crease in the top main.

    When I was setting mine up the Wizard  suggested trying moving the sling point until only a light pull on the combined batten parrel/downhauls brought the luff of the mains happily at a vertical line ideally at the forward edge of the mast (mine are a little aft of that).

    When you find the right spot you shouldn’t need the throat hauling parrel (the downhaul of which I see is interfering with the inflation of your top jiblet). I don’t need one, I just have paired combined parrel/down hauls on battens (numbered bottom up) 1&2, 3&4, and a single parrel/downhaul on batten 5, and a yard hauling parrel from the sling point.

    It looks great, you’re going to have a lot of fun.

  • 15 May 2021 21:39
    Message # 10509351

    Inspired by Slieve's, Arne's, Paul's and Edward's great examples, directly based on Rudolf van de Brug's sail and built by JR member & sailmaker Frank van Zoest - here is Siskin's new SJR.

    And yes, still very much a work in progress but slowly and surely getting there.

    Remarks, suggestions for improvements etc. all very welcome!

    3 files
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