S2 6.7 Junk Rig Conversion

  • 12 Jul 2022 22:02
    Reply # 12846526 on 6872873
    Anonymous member (Administrator)

    On my three last junks I have not had problems with twist in the halyard. My guess is that this has two reasons:

    • There are two blocks at the masthead plus two blocks or points at the slingpoint on the yard, sitting about 20cm apart. Together these will prevent the halyard from making a big twist.
    • The tail of the halyard has not been coiled in my last three boats (Johanna, Frøken Sørensen and Ingeborg). They are all being stuffed in a canvas bag, mountain-climber style.

    In case a rope has developed twist somehow, I toss one end over board and tow it for a while behind the boat, before hauling it back in. 
    Even the sheet is never being coiled. During sailing it is dropped randomly on the cockpit floor. After the trip, the line is stuffed in a bag, just as the halyard.

    This works well for me.

    Arne

  • 12 Jul 2022 18:44
    Reply # 12846195 on 12845167
    Arne wrote:

    The blocks on Ingeborg are not with swivels... I have sometimes bought swivel blocks, but then locked them...

    Arne

    I see that now, Arne. Sorry for the confusion. I really don't want to take the mast down again to lock the blocks in place. It has already gone up and down, then up and down and up once more this summer.

    If the halyard ends up very twisted then I guess I will have no choice.

    Last modified: 12 Jul 2022 20:00 | Anonymous member
  • 11 Jul 2022 23:22
    Reply # 12845170 on 6872873

    One trick I have learned is if you coil a rope clockwise every time, then you introduce twist in the rope. If you alternate between coiling clockwise then coiling anticlockwise, the twist cancels out and you get a nice relaxed rope that runs easily and does not twist when hoisted.

  • 11 Jul 2022 23:20
    Reply # 12845167 on 6872873
    Anonymous member (Administrator)

    The blocks on Ingeborg are not with swivels... I have sometimes bought swivel blocks, but then locked them...

    Arne

  • 11 Jul 2022 22:19
    Reply # 12845073 on 12843482
    Annie wrote:

    The usual cause of halyard twist - once new rope has settled down - is allowing the block(s) to swivel.  Yours are locked, aren't they?

    Nope. All the blocks are on swivels. I have fixed blocks, and I planned to use them. More recently I ordered additional blocks, this time with swivels, so I could make my mast head as much like the photos from Arne as possible. Maybe I will go back to fixed blocks next year if this doesn't work out.

    I think I had problems with twist for two reasons last year.

    1. I bought the cheapest double braided polyester I could find.
    2. I was in the habit of coiling the rope around my hand and elbow at the end of every sail before storing it on a winch.

    The old halyard is now very stiff and kinks easily. I imagine the core and the outer-braid are very badly twisted around.

    edit: And only now do I notice that Arne seized the swivel blocks. darn.

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    Last modified: 11 Jul 2022 22:24 | Anonymous member
  • 10 Jul 2022 03:22
    Reply # 12843482 on 6872873

    The usual cause of halyard twist - once new rope has settled down - is allowing the block(s) to swivel.  Yours are locked, aren't they?

  • 08 Jul 2022 14:09
    Reply # 12842176 on 6872873

    Thank you for the suggestions Annie and David. For now I decided to launch the boat so I can at least try to get sailing before the summer is over. I think I will sand out the existing checks and put some thickened epoxy and paint on them sometime soon. In the coming winter I will (somehow) remove the paint and any bad wood before putting glass and epoxy over everything.

    Yesterday with the help of two friends I got the boat from my house on the trailer to the mooring ball in 3.5 hours. That was a lot after already working all day.

    Here are the changes so far since last season:

    1. A 3 part halyard to replace the 2 part halyard I tried originally.
    2. White paint on the tabernacle. (I think it looks a little better now)
    3. Swim/Boarding ladder on the stern
    4. Rudder cracks ground out, filled and sanded, and the complete rudder painted
    5. New mast hinge arrangement
    6. Replaced the halyard with this rope. I hope this will eliminate the issues with rope twist.

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    Last modified: 08 Jul 2022 14:42 | Anonymous member
  • 29 Jun 2022 03:32
    Reply # 12832147 on 12826902
    Scott wrote:The small cracks in the plywood of the mast partners do not look so small anymore. I am trying to decide if this needs to be fixed right now before I use the rig or if this can wait until next winter for a repair.

    To me it looks typical of what happens with fir plywood.  I would never leave it without putting a layer of glass over it, to ensure that it is fully protected by epoxy.  The dry areas on the glass will tell you where to go back and then, of course, you will put another coat or two on to fill the weave.  I wouldn't bother with double bias myself - I find it difficult to wrap around corners and I don't believe you are actually needing more strength: just better protection. 

    I'd be inclined to take a heat gun to it, remove the paint (some of the epoxy will come with it).  This should show you if there's anything unpleasant going on, but I suspect all you will need to do is sand the shakes and maybe fill them.  Then I'd coat it, put the cloth on straight away and sqeegee the epoxy around to ensure there are no dry patches.  Ideally, the end result is matt, not shiny.  Another couple of coats and a slap of paint and that should be the end of it.

    So now you have two different ideas!!

  • 24 Jun 2022 21:24
    Reply # 12828139 on 12826902
    Scott wrote:

    It has been a very slow start to the sailing season for me. My boat is still on the trailer at my house. Every time I think I am ready to launch something else comes up.

    The small cracks in the plywood of the mast partners do not look so small anymore. I am trying to decide if this needs to be fixed right now before I use the rig or if this can wait until next winter for a repair.

    I plan to sand, or grind or plane down the wood to remove the paint and then add 6 oz glass cloth and epoxy. Right now it it is plywood, un-thickened epoxy and paint. It seems like that is not good enough.

    I am embarrassed to show my sloppy epoxy work and even worse paint job, but I could really use some advice.

    Would anyone like to guess at how urgent this is?


    Hard to tell by just looking at that one photo and without the context of where it is in the overall structure. But assuming there is no rot in behind there this looks like cracking in the outer layers of plywood due to inadequate protection from weathering. But I would not let it stop me from going sailing. If it were me I would take to the area with some gentle grinding to remove the paint and see what is going on. Then to protect and strengthen I would put on probably two layers of double bias fiberglass cloth set in epoxy. Then I would get back to the priority of going sailing! If you do not have any double bias cloth then just some layers of regular woven cloth would do.
  • 23 Jun 2022 20:24
    Reply # 12826902 on 6872873

    It has been a very slow start to the sailing season for me. My boat is still on the trailer at my house. Every time I think I am ready to launch something else comes up.

    The small cracks in the plywood of the mast partners do not look so small anymore. I am trying to decide if this needs to be fixed right now before I use the rig or if this can wait until next winter for a repair.

    I plan to sand, or grind or plane down the wood to remove the paint and then add 6 oz glass cloth and epoxy. Right now it it is plywood, un-thickened epoxy and paint. It seems like that is not good enough.

    I am embarrassed to show my sloppy epoxy work and even worse paint job, but I could really use some advice.

    Would anyone like to guess at how urgent this is?


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    Last modified: 23 Jun 2022 20:25 | Anonymous member
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