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Thread: Young 3.3 Dinghy

  1. #1

    Default Young 3.5 Dinghy

    Got hold of a new project! This is allegedly a Young 3.3, although I can find no information on it. Length is more like 3.5 m over all, and 1.6 m wide. It has sat unused for many years, but most of the plywood seems to be in good condition. There is some rot around the starboard stern area which will have to be addressed, as well as the skeg/keel. It's got a stayed alloy rig with main and jib, and a trailer which also needs attention.

    (EDIT: I changed the title since I've found some references to Young 3.5's)

    If anyone knows more about the design, please let me know!





    Last edited by tdem; 02-20-2016 at 10:07 PM.

  2. #2
    Join Date
    Aug 2000
    Location
    Auckland ,N.Z.
    Posts
    23,806

    Default Re: Young 3.3 Dinghy

    Jim Young is a legend. He describes himself as an intuitive designer ..... all his boats are good boats.
    I've used his 2.7 dinghies before but don't know that particular one. Looks like I'd expect one of his to look like though.

  3. #3

    Default Re: Young 3.3 Dinghy

    Yes I agree it has the look! Looking forward to getting it on the water. It looks like there's a Young 3.5 design, so I guess that's what it is.
    Last edited by tdem; 02-20-2016 at 10:08 PM.

  4. #4
    Join Date
    May 1999
    Location
    West Boothbay Harbor, Maine
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    23,092

    Default Re: Young 3.3 Dinghy

    Nice!
    "And so the seasons went rolling on into summer, as one rambles into higher and higher grass." Thoreau, "Walden"

  5. #5

    Default Re: Young 3.3 Dinghy

    I'm sure no-one here would be surprised that once I started digging...

    I've added some more photos to the album:
    https://www.flickr.com/photos/443654...57664848544556

    I've hammered and prised away most of the bad plywood. Unfortunately the transom is in a worse state than I initially thought. Most of the bottom was solid epoxy filler, covered by several layers of random bits of ply epoxied and siliconed on top.

    The worst discovery is the stringer (cleat?) which runs along the bottom on the inside of the buoyancy tank is completely toast. It's unfortunate because it continues well into the area where the plywood is still fine. This means I might have to remove a lot more good ply than I'd like. Unless I can get at it through the hole. I could just leave it in, it seems that if the rot was to spread it would have done so already. On the other hand is is like a sponge with a layer of porous fibreglass over top.

    The second problem is how to approach replacing the ply. The sides and bottom curve, and the transom is somewhat curved as well. Being a stitch and glue boat there is no frame once I remove the ply, and I loose my references. Also, in the original boats construction the seat tops would have been put on last, but I'd like to avoid removing those as they are fine.

    The ply that has to be replaced is basically the last 2 feet, from the port chine across to where the starboard buoyancy tank starts. As well as the lower foot of the transom across this same region. (As well as that pesky stringer, which might be rotten all the way to the front of the tank).

    Any suggestions on the easiest way to do this? I'm thinking make a template of the transom, then replace the necessary ply on the bottom (basically the last 2 feet of ply), followed by the lower half of the transom. This would give me access to do the fillets inside the buoyancy tank through the open transom. Then add some framing and screw the transom on.

    The alternative is to do the transom first, then put in essentially chine logs and framing and put the bottom on that way. This seems easier to me.

    Also, scarf in the new bottom section, or butt block?


  6. #6

    Default Re: Young 3.3 Dinghy

    This shows the stringer, as you can see I was able to push a screwdriver right into the end of where it extends under good ply.

  7. #7
    Join Date
    Jul 2005
    Location
    Australia
    Posts
    2,108

    Default Re: Young 3.3 Dinghy

    Looks like your`e right ...3.5 m

    This is from a fellow Kiwi on his blog .....

    And I still have plans for a Jim Young 3.5m stitch and tape sailing dinghy, if I get really ambitious.
    Maybe worth contacting him ?

    Blog link below :

    https://www.google.com.au/url?sa=t&r...CDmH6Yj5LMLMrw

  8. #8
    Join Date
    Mar 2015
    Location
    Pukekohe, New Zealand
    Posts
    130

    Default Re: Young 3.3 Dinghy

    Tdem, you have a major job here. I would do the refit this way.
    Make an exact copy of the transom, and set up right inside the old one. You should be able to do this by measurement.
    There is no kelson (inside hull keel) as it is stitch and glue hull which makes it a challenge.
    Set up hull upside down and brace both gunwales so they are square. On the worst side remove from the centre as far forward
    as the butt block where the sheets join. Use what is left to pattern a 2 new bottom sections.
    Doing one side at a time stitch and glue into position each bottom section and join to the old hull bottom at the butt blocks.
    Start the second once the first side has dried.
    You have a big challenge with this job.

  9. #9

    Default Re: Young 3.3 Dinghy

    Was shocked to see it's been almost two years! The boat has been sitting outside on a trailer, covered with a tarpaulin. I've made sure there hasn't been any water sitting in it.

    I finally got stuck in and made some progress. My annual leave coincided with a sudden week of constant rain, so really nothing else to do!

    I ended up partially following Don Macleods advice, with some lazy shortcuts and also wanting to try out some different techniques.

    I started out with a template of the transom, then cut away the bottom panel on one side. Next I made a template of the remaining bottom panel. The rot had spread through the side panel of the buoyancy tank so I made a template of this too and then removed it. This also gives me access to make the chine joint on the inside.



    I decided to keep the top bit of the transom as it's sound and saves me a ton of work. I simply glued the new transom right over top of what remained of the old transom.






    I've also cut away part of the other bottom panel. This bit I will try to do with butt joins with glass on each side. The larger panel I will try to scarf in at the old butt block location. The rest is all standard stitch and glue.



    So far the work has been about equal amounts of staring and jigsaw work. The jigsaw with a metal cutting blade will cut right through the copper ties which is great. Other than that a lot of sanding, mostly angle grinder and some random orbital. Very unpleasant with all the fibreglass dust.

    Templates have been interesting. By the time I take a pattern off an existing hull, cut it out, trace it and cut it out again I lose a lot of accuracy. Luckily for this project I don't care.

  10. #10

    Default Re: Young 3.3 Dinghy

    Some more progress.





    Album

  11. #11
    Join Date
    Oct 2008
    Location
    Walney, near Cumbria UK
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    37,321

    Default Re: Young 3.3 Dinghy


    Is that unpainted wood a doubler put in to strengthen already weak ply?
    If so the bottom stiffeners were cut back (one on one side and two on the other) and will need reinstated properly.
    Nice little dink.
    It really is quite difficult to build an ugly wooden boat.

    The power of the web: Anyone can post anything on the web
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  12. #12
    Join Date
    Mar 2015
    Location
    Pukekohe, New Zealand
    Posts
    130

    Default Re: Young 3.3 Dinghy

    Looks great. Your workmanship has addressed all the challenges.
    Thank you for sharing your work with us

  13. #13
    Join Date
    Apr 2011
    Location
    Brisbane, Australia
    Posts
    2,665

    Default Re: Young 3.3 Dinghy

    Flat bottomed boats, you make the rockin' world go round.............

  14. #14

    Default Re: Young 3.3 Dinghy

    Thanks for your comments. I'm currently halfway through fitting the new seat/tank side. After that I'll fit new doublers for the bottom as suggested.

    Nice video! Unfortunately my sails aren't as fancy. Also interesting to note that boat has a keel stepped mast whereas mine is basically deck stepped.

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