Forgot password

S2 6.7 Junk Rig Conversion

  • 25 Mar 2019 14:37
    Quote
    Reply # 7243174 on 6872873
    Anonymous member

    To keep my project going I will need to make a decision on battens. I have come full circle and now I am thinking alloy battens again.

    Arne was kind enough to suggest that I look for 25mm OD and 21mm ID AL alloy (25x2mm).

    Considering the price and weight I would like to use 6061-T6 with a 1" OD and a wall thickness of 0.065". If I did the math right this works out to a 25.4mm OD and 22.1mm ID. This is a slightly larger OD but with thinner wall compared to what Arne suggested.

    I think this is the same size used on 'Brenda B'. The listed displacement I found for my S2 6.7 is 2200lbs and the Com-Pac 19 is 2000lbs. Pretty close. But on the other hand my battens will be longer than the ones that 'Brenda B' carries.

    Does anyone have reason to expect 6061-T6 with a 1" OD and a wall thickness of 0.065" is not strong enough for my rig?

    Last modified: 25 Mar 2019 21:33 | Anonymous member
  • 21 Mar 2019 16:54
    Quote
    Reply # 7238244 on 6872873
    Anonymous member

    In a cambered panel sail, both the luff and the leech are concave with the sail on the floor, because of the extra cloth you've sewn in.  You won't really see what you've made until the battens are in place.
  • 21 Mar 2019 13:14
    Quote
    Reply # 7237893 on 6872873
    Anonymous member

    Panels Seven, Six, Five and Four stitched together. Is the luff straight enough? I don't worry. I'm happy.

    More photos in my album here.

    1 file
  • 12 Mar 2019 12:36
    Quote
    Reply # 7214534 on 7214327
    Anonymous member
    Anonymous wrote:

    Whether it is good enough or not, depends on who is judging it. All I can say it that I could not make it better than that.

    So keep up the good work!

    Arne

    Thanks Arne,

    I really appreciate people like yourself who make me feel like a part of the JRA. Your encouragement from the other side of the Atlantic is helpful. And of course  drawing the sailplan and providing all the detailed instructions are a big help too!

    I now have panel 7 stitched. I find it amazing how just getting one hem folded and sewn already makes this feel more like a sail and less like just a piece of cloth. I am less sure about those wrinkles that have shown up. I hope this is an artifact of the 'barrel rounding' I want and not evidence of an error I made.

    2 files
    Last modified: 12 Mar 2019 13:27 | Anonymous member
  • 12 Mar 2019 08:48
    Quote
    Reply # 7214327 on 6872873
    Anonymous member (Administrator)

    Whether it is good enough or not, depends on who is judging it. All I can say it that I could not make it better than that.

    So keep up the good work!

    Arne
  • 11 Mar 2019 21:25
    Quote
    Reply # 7213558 on 6872873
    Anonymous member

    I cut out one panel. I hope it is in the 'good enough' league.


    1 file
    Last modified: 11 Mar 2019 22:13 | Anonymous member
  • 25 Feb 2019 14:12
    Quote
    Reply # 7185735 on 6872873
    Anonymous member

    OK! Thank you both for the very quick responses.
  • 25 Feb 2019 08:58
    Quote
    Reply # 7185451 on 6872873
    Anonymous member

    V69 is plenty strong enough, and you will enjoy how a bobbin full of thread lasts a lot longer than with V92, when you are sewing long seams. I made Weaverbird's current sail, of quite heavy cloth, with V69, and it's fine.

    Don't worry, be happy!
  • 25 Feb 2019 08:27
    Quote
    Reply # 7185429 on 6872873
    Anonymous member (Administrator)

    Scott

    I would say that V-92 thread is bordering to oversize. I bet V-69 is plenty good enough. I just decided to use the thickest thread my Pfaff 360 would take. I have repaired a number of seams of old sails and sprayhoods, and just thought that thicker is better. The V69 thread is probably what a sailmaker would recommend.

    Sooo....

    don't worry, be happy!

    Arne

    PS: Don't forget that the stretch in the middle of a junksail is much lower than in an ordinary sail of the same size. As long as you get a good boltrope on, which takes most of the loads, the rest of the sail will live an easy life.

    Last modified: 25 Feb 2019 08:40 | Anonymous member (Administrator)
  • 25 Feb 2019 01:30
    Quote
    Reply # 7185116 on 6872873
    Anonymous member

    My order of Weathermax 65 (LT) should be here in a few days. In preparation I have been carefully studying the photos and comments in Arne's 'Ingeborg, photos from the construction of the sail' photo album here.

    The thread I ordered is V-69 polyester as shown here. I am now concerned that I should have gone with V-92 thread. It looks like V-92 is approximately the size Arne used. Several sail making resources such as sailrite suggest that V-69 is for outdoor furniture and V-92 should be used for sail making.

    I would rather not buy an additional, and even more costly, spool of thread but I absolutely do not want to ruin my sail project by using the wrong thread.

    Does anyone have a strong opinion on if I should use the V-69 or NOT use the V-69?
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

                                                              Site contents © the Junk Rig Association and/or individual authors

Powered by Wild Apricot Membership Software