Galion 22 conversion

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  • 13 Mar 2020 12:06
    Reply # 8824989 on 5070195

    Getting there - 60% done!


    1 file
  • 11 Mar 2020 14:17
    Reply # 8821008 on 5070195

    Actually, I was not thinking of inducing twist, but to reduce it with less sheeting angle on the upper jiblets.

    Last modified: 12 Mar 2020 11:34 | Anonymous member
  • 09 Mar 2020 07:39
    Reply # 8809865 on 5070195
    Anonymous member (Administrator)

    Jami

    frankly, I think the idea of twist is something we have inherited from the Bermuda sloops. On these the foresail pre-bends the airstream more in the lower half than in the upper, so it makes sense to have twist in the mainsail. If the sloop is of the partial jib type, like the Nordic Folkboat, more twist is needed to avoid stalling the top section of the main.

    On my sloop JRs, I have found that next to no twist is best. That is when the telltales at the leech of all the panels are easy to make fly (photo below). However, on fully fanned junkrigs, I understand that controlled twist is used to induce camber in the otherwise flat sails, but that is another story.

    Arne



  • 09 Mar 2020 06:06
    Reply # 8809800 on 5070195

    Point taken, thanks!

  • 08 Mar 2020 20:56
    Reply # 8809255 on 5070195

    What twist?

    I don't think there is any twist in my sail (with 2-part sheeting) and one of the things I rejoiced in when making the Amiina-type SJR was that the jibs (and mains) are all identical. Nice and simple. There might be some point in sequentially reducing camber, perhaps - though everything comes at a cost - but I would never have thought of reducing sheeting angle.


    Another thing, if you reduce the sheeting angle of the upper jibs, how are you going to reduce the sheeting angle of their associated main panels? I must be missing something here.

    Last modified: 08 Mar 2020 21:02 | Anonymous member
  • 08 Mar 2020 19:09
    Reply # 8809143 on 5070195

    33% of the sail done - two lowest mains and jiblets of the SJR that is!

    Suddenly a thought came to my mind: why would one not reduce the sheeting angle gradually to counter the twist? 

  • 06 Mar 2020 09:57
    Reply # 8800518 on 8795952
    I am envious of your sewing ability.


    Thanks,
    but what I've learned so far (with this one being my third junk sail) is that the difficult work happens before the sewing. It includes the sailplan and especially the magic of turning the 2D cloth into a cambered 3D sail.

    And fortunately this mastery has been done for the rest of us by people like Arne, Slieve, David and others.

    Last modified: 06 Mar 2020 10:38 | Anonymous member
  • 04 Mar 2020 21:30
    Reply # 8795952 on 5070195

    The sail looks really sharp, Jami. I am envious of your sewing ability.

    I expect a yellow sail will provide good visibility during the day and at night.

    Last modified: 04 Mar 2020 21:31 | Anonymous member
  • 25 Feb 2020 20:00
    Reply # 8769925 on 5070195

    Moving on nicely. The first jiblet and main soon made, and I’ll be able to slide them to batten tubes and check everything is as it should.

    I’m using 45 deg shelf foot method for both the jiblets and the mains. I’ll also continue with the hinge method, like I did on my previous sails. Despite the work, I like the modular sail for several reasons.

    11% camber and 12% sheeting angle for the jiblets, 8% camber for the mains. These are for the lowest 2-3 panels and will be less after that.


    1 file
  • 13 Feb 2020 20:26
    Reply # 8745709 on 5070195

    I'm sure you'll do a great job, Jami and I'm looking forward to seeing photos of the sail up and your boat underway.

    There are lots of reasons to like coloured sails, but I'm with you about their being more visible.  White sails on white boats get lost among the white caps.  (And one thing I find utterly bewildering is people who equip their boats with white life rings!) Of course, we all have different prefences about colours, but I love yellow for its sunny connotations.  I used it inside Missee Lee and the interior always seems so welcoming.  Hmmm.  Maybe I should give Fanshi yellow cushions!

    Anyway, happy sewing.  You'll be ready to sail as soon as the weather permits.

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