Galion 22 conversion

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  • 14 Sep 2018 16:39
    Reply # 6669194 on 5070195
    Anonymous member (Administrator)

    Jami,

    The best yard angle is mainly a function of required balance of the sail. As said, my hunch is that your felt improvement stems from moving the sail forward, as well as reducing area. 

    If you try with the top panel again, and then shift the sail as far forward as you can, how does the helm balance end up? Remember, a ten degree, or even just a five degree rudder angle is not good for the speed.

    My own experience with the three top panels with 70deg. yard, has been very good, both on my present Ingeborg, and on the much more tender Frøken Sørensen.

    Arne


  • 14 Sep 2018 15:56
    Reply # 6669091 on 5070195

    Yep,

    But I wish I could get the same sailing quality with the top panel. It looks so much nicer.

  • 14 Sep 2018 15:41
    Reply # 6669056 on 5070195
    Anonymous member (Administrator)

    When I turbo-charges Malena’s flat sail in 1991 by fitting hinged battens and 10% camber, I soon found the boat to be over-rigged. Before next season, I had permanently rolled up the lowest panel, and the mast was cut down from 9.7 to 8.7m. In addition, the solid spruce pole was planed down 1-2cm (diameter). This turned out to be a big improvement.

    In those early days I had no experience with un-stayed masts, so I bet the first version was about 80kg, which was 5.7% of Malena’s displacement. The mast of Ingeborg is less than 2.5% of her displacement  -  so I must have learnt a bit since then.

    My guess is that when you have sailed for a while with the top panel removed (SA reduced from 27.3 to 23.0sqm), and with the sail shifted a bit forward, you will like it, and then you can shorten the mast as well, which will improve the boat as it did on my Malena.

    Arne


  • 14 Sep 2018 11:18
    Reply # 6668823 on 5070195

    Just out of curiosity, if nothing else, you can see a live feed video I did yesterday to Facebook (I think the video can be seen even if you are not a Facebook-user). The sail isn't properly visible, but eg from 7:00-> you (or at least I) can feel the good drive against the wind and swell, that I hadn't experienced with the JR on the Galion before this. Now it reminded me of the good headwind drive of the BR from last year! I think I have four panels up here.

    Last modified: 14 Sep 2018 19:37 | Anonymous member
  • 14 Sep 2018 10:57
    Reply # 6668805 on 5070195

    More testing is to follow.

    Regarding reefing, I compared the drive with four panels (ie 1-4)  in the original sail and four  panels (2-5) on the experimental one, so no difference in the SA.

  • 14 Sep 2018 10:42
    Reply # 6668800 on 5070195

    Jami, you recently changed to upper and lower sheeting. I wonder if now you have enough pull on the upper part of the sail to oversheet it? As I said here,  I find that at full sail, I need less tension on the upper sheet. The best way to check this is with leech telltales - about half a metre of ribbon at the ends of the yard and upper battens. They should all stream aft, and if they are collapsing behind the sail, then the upper sheet should be eased. Yes, more balance = less helm load, but there should be no effect on the lift/drag ratio.

    But you're talking about 16 - 20 knots of wind, and if your sail is just too big for the boat, and you're not reefing very much of it, could it just be the case that you're over-pressing the boat, and as is usually the case, when you take another reef, you go faster?

    Having said that, I wonder whether you're also simply experiencing the same feeling as I get with Weaverbird's sail, that the lower angle of the yard (subjectively, if not objectively) just makes everything seem easier? Anyway, as Arne says, if it works to take the top panel off, then go for it - after, of course, testing in as many conditions and over as long a period as you can. Do nothing too hastily.

  • 14 Sep 2018 10:37
    Reply # 6668797 on 6668796
    Anonymous member (Administrator)
    Anonymous wrote:

    Can you say what are the potential risks, should I leave the sail this way?

    The yard is already quite stong.


    I think you'll be fine with your modified sail.

    A.

  • 14 Sep 2018 10:35
    Reply # 6668796 on 5070195

    Can you say what are the potential risks, should I leave the sail this way?

    The yard is already quite stong.

  • 14 Sep 2018 10:32
    Reply # 6668795 on 6668791
    Anonymous member (Administrator)
    Anonymous wrote:

    Yes,

    The balance is affected a bit, which might indeed explain a bit of the change. However, it can’t be the reason for the drive/heel change, can it?


    The point is, we cannot know if the felt increase in drive from the sail, in fact is that, or if it is a result of reduced drag.

    Arne

    Btw, when we sail fully close-hauled, it is actually the lift of the sail which is the main contributor to heeling the boat. Could it be that the lower yard moved the centre of pressure far enough down to make the boat sail more upright, even with the same sail area set?

    Last modified: 14 Sep 2018 10:36 | Anonymous member (Administrator)
  • 14 Sep 2018 10:26
    Reply # 6668791 on 5070195

    Yes,

    The balance is affected a bit, which might indeed explain a bit of the change. However, it can’t be the reason for the drive/heel change, can it?

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