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Galion 22 conversion

  • 24 Apr 2020 07:23
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    Reply # 8925205 on 5070195
    Anonymous member

    Hi Jami, I am watching constant progress in your sailmaking. You're doing well and I am interested in your project as this is what I will be doing in a few month. There is constant discussion in this JRA community on best kinds of fabric to be used to make sails. I see you choose OUTGARD. Could you inform which grammature you use? This fabric is coated, but can not find info - whether both sides, or one side only? I guess it was purchased via Internet - where from you have bought it? I am in Poland, so the same region, maybe can use the same supplier, if you recommend. Wish you luck with the project. Kris
  • 23 Apr 2020 18:13
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    Reply # 8924228 on 5070195
    Anonymous member

    That's great news, congrats Jami!
  • 22 Apr 2020 11:12
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    Reply # 8920976 on 8913728
    Anonymous member
    Weather helm gone when heeling?  Or is the boat providing enough drive without having to heel and cause weather helm?

    No, of course not as such. I think that the heeling-induced weather helm is counteracted fast by the good sail balance as soon as the mast turns a bit upwards again. But the drive issue might also be playing a part, at least this was one of the intended goals.

    Anyway, too early to say too much. And because my understanding of the aero/hydrodynamics is so very limited, I will probably never have good answers anyway :)
  • 21 Apr 2020 14:50
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    Reply # 8913728 on 5070195
    Anonymous member

    Congratulations, Jami, on what seems to be mission accomplished.

    Weather helm gone when heeling?  Or is the boat providing enough drive without having to heel and cause weather helm?

    Curious to know where the calculated C of E is now, both in comparison to the 1st Junk Rig  and also the Bermudan.


    Anyway ,congratulations again and hopefully a happy summer of sailing.
  • 21 Apr 2020 12:27
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    Reply # 8913391 on 5070195
    Anonymous member

    Hooray! The first 1 hour test sail with the new SJR is done!

    Quite a lot of rig-tweaking to be done, but at this point this is obvious: the balance is now spot on. If the wind is steady, the boat seems to stay quite happily on course with a center-locked tiller while sailing to about 60% to the wind. The tacking is also lot easier now.

    Photos/videos and more impressions, when the sail sets nicely.

    (And yes, we have no sailing-restricting lockdown in Finland as of yet.)
  • 13 Mar 2020 12:06
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    Reply # 8824989 on 5070195
    Anonymous member

    Getting there - 60% done!


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

    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
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    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
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    Reply # 8809800 on 5070195
    Anonymous member

    Point taken, thanks!
  • 08 Mar 2020 20:56
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    Reply # 8809255 on 5070195
    Anonymous member (Administrator)

    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 (Administrator)
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