S2 6.7 Junk Rig Conversion

  • 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
  • 03 Jun 2022 16:13
    Reply # 12804569 on 12793664
    Arne wrote:

    PS: I guess nylon should work. Mine was made of 8mm line, I think it was, but 10mm should also be fine.

    I went way too big when I ordered this line. It is 3/4" which is about 19mm. I thought I would sleep better with something oversized attached to the mooring ball. I didn't think about it being too big for the deck cleats.

    Maybe I can use this rope to lift the boat off the trailer!

  • 25 May 2022 19:51
    Reply # 12793664 on 6872873
    Anonymous member (Administrator)

    Hi Scott

    Monofilament rope (versus multifilament) is when the tiniest element or fibre in a thread is endless. This happens when it is extruded and then spun together with other elements. The resulting line and rope look quite shiny or ’silky’. Remember, each natural silk thread is also ‘extruded’ from the silk worm, so are just about monofilament.

    You can have monofilament ropes, 3-strand or braided from any materiel, nylon, polyester or polypropylene, etc..

    Multifilament threads are spun from shorter fibres, for instance wool, hemp or chopped up nylon-polyester-or-whatever.

    Multifilament ropes, for instance on the outer layer of braided lines give better friction to the hand, so many prefer them. I on the other hand prefer halyards and sheets from monofilament (braided) rope because it stands up better to abrasion, so lasts longer. I compensate by using gloves, or my ‘Halyard Hauler’.

    The fact that the rope is a bit slippery and resistant against chafe was my reason for trying it on my soft euphroe (polyester).

    Good luck!

    Arne

    PS: I guess nylon should work. Mine was made of 8mm line, I think it was, but 10mm should also be fine.


    Last modified: 26 May 2022 09:27 | Anonymous member (Administrator)
  • 25 May 2022 17:57
    Reply # 12793520 on 11129789
    Arne wrote:

    Scott,
    It appears that you have the same friction problem as I detected on my Ingeborg this spring. If you reread that write-up and in addition check this year’s appendix to it, you will find that I replaced that single thimble up there with a ‘soft euphroe’. This has cut the friction enough to make the upper sheetlet set well.

    Arne

    I would like to try building a 'soft euphroe' like you did. I am not sure what monofilament rope is called here in the US. My best guess is what stores here call 'hollow braided polypropylene'.

    I have some new nylon line that is too large for the cleats on my boat. Would nylon work OK, or do I need something else?


  • 25 May 2022 17:41
    Reply # 12793478 on 6872873

    I cut into the entire edge of the rudder with an oscillating multitool to inspect it. The top part of the rudder seems to be solid fiberglass. The crack running around the edge of this section was very much superficial. I think only the gelcoat cracked.

    And the cracks in the lower part of the rudder were, I think, limited to some fairing material used to make the foil shape. The first 5mm or so were very soft before I hit a very solid material.

    I filled the cut around the whole thing with thickened epoxy. Then I sanded. Then I filled again. Then I sanded again before finishing with several coats of topside paint and bottom paint.

    I have more confidence in my rudder and I think it looks a little better than before.


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    Last modified: 25 May 2022 17:42 | Anonymous member
  • 12 Nov 2021 10:44
    Reply # 12121308 on 12117257
    Scott wrote:

    I need to find a way to be in New Zealand by this time of year. A much bigger boat, maybe.
    Or you could pick up a second JR in New Zealand with the requisite accommodation and do a longer version of the annual "snow goose" migration so many in the colder north of the  USA do down to Florida. :-)
    Last modified: 12 Nov 2021 10:48 | Anonymous member
  • 11 Nov 2021 07:33
    Reply # 12118280 on 12117257
    Scott wrote:

    I cleaned out the crack around the rudder. It all seems to be substantial foam or glass after the first 5mm or so. Last night the temperature dropped to 28F. I need to keep a close eye on the weather forecast and the thermometer in my garage. I hope there is still time left this year for mixing epoxy outside.

    Edit: I need to find a way to be in New Zealand by this time of year. A much bigger boat, maybe.

    Hard to imagine the temperature getting so cold that epoxy work needs to stop, I don't think that would happen anywhere in New Zealand. I live in the north of the country and although where I live early morning temperatures in the winter can get down to zero degrees Celsius, it does not stay that cold for long with daytime temperatures during the winter up to 15 degrees or more Celsius. So provided I use a fast hardener epoxy work is possible year round. When I was building my catamaran which was mostly outside, only part of the structure had a roof over it, I kept building and doing epoxy work throughout the winter.

    I did for a while live in one of the coldest parts of New Zealand in the bottom of the South Island in an area known as Fiordland, and sometimes day time temperatures hovered at or just below zero degrees Celsius, but then there were also a lot of much warmer days. I do remember one day flying from our home city of Auckland back down to Queenstown which was our closest airport to where I worked and lived, and I went from a temperature of 14 degrees Celsius in Auckland to minus 4 degrees in Queenstown just two hours later, but that was very alpine. That was in June which is right into the depth of our winter. You definitely need to be able to fly south for the winter!

    Yep, if there is a crack in the rudder blade I would just patch it up and then not worry about it. Put the extra money towards the next boat.

    Last modified: 11 Nov 2021 07:35 | Anonymous member
  • 10 Nov 2021 21:31
    Reply # 12117257 on 12113681
    David wrote:

    [...] You will be descending very quickly into winter, and down here in New Zealand we are finally starting to get some summer like weather and are looking forward to summer holidays and lots of sailing within the next 7 to 8 weeks. 

    I cleaned out the crack around the rudder. It all seems to be substantial foam or glass after the first 5mm or so. Last night the temperature dropped to 28F. I need to keep a close eye on the weather forecast and the thermometer in my garage. I hope there is still time left this year for mixing epoxy outside.

    Edit: I need to find a way to be in New Zealand by this time of year. A much bigger boat, maybe.

    Last modified: 11 Nov 2021 01:22 | Anonymous member
  • 09 Nov 2021 18:48
    Reply # 12113681 on 12113583
    Scott wrote:

    Hi David,

    Thanks for the response. I think the upper part of the rudder is solid glass and polyester and I suspect the lower section is fiberglass with a foam core. Being unsure is part of my problem. I don't know if the 'soft stuff' in the lower section is foam and is expected to be soft, or if it is soft because it has deteriorated.

    I was calling the section that is generally underwater the 'red' section and the part that sits above the water in the rudder head the 'white' section. I guess it is more like a section with remnants of red paint and not really solid red. I attached cropped and labeled photo.

    That rudder blade looks to me like it should still be very substantial, and if there is no real flexing or bending in it I think it should last a long time. For the size of boat and the shape of the blade it will be of fairly robust construction. I would have thought the area where your rudder is most likely to fail is at the hinge point and the upper rudder, that is where I would be looking for any signs of failure. So if it were me I would carry our any essential spot repairs to the blade, and check the upper part of the rudder, and save myself a lot of money. A good way to check the overall rudder structure is with the boat out of the water and the blade as much as possible in the lowered sailing position, grab the bottom of the blade and try and move it from side to side. If there is no excessive flexing in the structure then it should be fine, especially considering the size of boat. The foam core of the lower rudder blade will be soft. If the blade is not unduly heavy, and does not have a lot of water seeping out of any cracks etc, then there has probably been little water ingress. But even that should not matter, the strength of the blade being in the fiberglass shell, and even old fiberglass does not deteriorate unless it has osmosis which would be unlikely for your colder climate. The only other thing which would cause the fiberglass to delaminate and fail would be impact damage.

    I know it is very easy for me to say this being thousands of miles away. You will be descending very quickly into winter, and down here in New Zealand we are finally starting to get some summer like weather and are looking forward to summer holidays and lots of sailing within the next 7 to 8 weeks. 

    Last modified: 09 Nov 2021 23:48 | Anonymous member
  • 09 Nov 2021 18:17
    Reply # 12113583 on 12112173
    David wrote:

    [...]Is your rudder of fiberglass construction, and maybe with a foam core? I could not see anything in the photos which indicated a serious problem The strength of the rudder would be in the fiberglass either side. 

    I couldn't quite see where the red section is [...] 

    Hi David,

    Thanks for the response. I think the upper part of the rudder is solid glass and polyester and I suspect the lower section is fiberglass with a foam core. Being unsure is part of my problem. I don't know if the 'soft stuff' in the lower section is foam and is expected to be soft, or if it is soft because it has deteriorated.

    I was calling the section that is generally underwater the 'red' section and the part that sits above the water in the rudder head the 'white' section. I guess it is more like a section with remnants of red paint and not really solid red. I attached cropped and labeled photo.

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    Last modified: 09 Nov 2021 18:18 | Anonymous member
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
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