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Ptarmigan 17 glued lapstrake yawl

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  • #31
    Re: Ptarmigan 17 glued lapstrake yawl

    Originally posted by Peerie Maa
    Loose tenons
    Wrong, Loose tenon uses a third piece to create the tenon, ie:- biscuit or domino joints.

    These are, as Johan suggested, half lap joints!

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    • #32
      Re: Ptarmigan 17 glued lapstrake yawl

      Originally posted by Steve TN 15
      Wrong, Loose tenon uses a third piece to create the tenon, ie:- biscuit or domino joints.

      These are, as Johan suggested, half lap joints!
      Two nations separated by a common language?

      Those


      do not look like this

      I can even see the dowels securing the two ends of the loose tenon.
      It really is quite difficult to build an ugly wooden boat.

      The power of the web: Anyone can post anything on the web
      The weakness of the web: Anyone can post anything on the web.

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      • #33
        Re: Ptarmigan 17 glued lapstrake yawl

        They sure look like half-lap joints. Why not use dowels to secure half-laps?

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        • #34
          Re: Ptarmigan 17 glued lapstrake yawl

          In light of the following comment from Larks I'll clarify, This reply is to Nicks comment in which he has the gall to inform me that he knows how I made my joints and I don't. The older I get, the less patience I have for internet genii erroneously dolling out their wisdom in the desire to demonstrate their superiority.

          You're dreaming, there are no dowells there at all. You might be mistaking holes left by screws used for positive locating and clamping but removed after glue up. By the way, I'm the one building the thing so it's a bit rude and self righteous to tell me I don't know what joints I'm using!
          Last edited by Steve TN 15; 01-28-2023, 04:15 AM. Reason: Clarifying the reply

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          • #35
            Re: Ptarmigan 17 glued lapstrake yawl

            Steve, I think that may have been a question for Nick about the dowels: depending how you read his post it seemed to be suggesting that because he could see dowels (plugs over your screw heads?) they must be tenon joints...... and perhaps the ply transom attached to the frame could kinda look like the other side of tenon joint...???
            Larks

            “It’s impossible”, said pride.
            “It’s risky”, said experience.
            “It’s pointless”, said reason.
            “Give it a try”, whispered the heart.

            LPBC Beneficiary

            "Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great!"

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            • #36
              Re: Ptarmigan 17 glued lapstrake yawl

              Originally posted by Larks
              Steve, I think that may have been a question for Nick about the dowels: depending how you read his post it seemed to be suggesting that because he could see dowels (plugs over your screw heads?) they must be tenon joints...... and perhaps the ply transom attached to the frame could kinda look like the other side of tenon joint...???
              Larks, you are correct, I was mistaking the ply for the other 1/3 of the passing timber of a mortise.
              It really is quite difficult to build an ugly wooden boat.

              The power of the web: Anyone can post anything on the web
              The weakness of the web: Anyone can post anything on the web.

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              • #37
                Re: Ptarmigan 17 glued lapstrake yawl

                I really like this design. Have to say that that is not true of all PF's drafting. But, he does many for all tastes.
                So, will be paying attention.

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                • #38
                  Re: Ptarmigan 17 glued lapstrake yawl

                  Originally posted by Andrew2
                  I really like this design. Have to say that that is not true of all PF's drafting. But, he does many for all tastes.
                  So, will be paying attention.
                  Yes, I skipped over this one many times because as originally drawn it's not a pretty boat but the 4 strakes change it completely.

                  I'm at a bit of a stand still now, waiting for an Oughtred Acorn to vacate the build frame at the boatshed, probably around a months time.

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                  • #39
                    Re: Ptarmigan 17 glued lapstrake yawl

                    Can you ever have enough clamps? I can't believe I built a Tammie Norrie with a few less than this. Just enough to laminate two layers of 9mm ply for the rudder. Thankfully there are quite a few more at the Boatshed for when I start building in earnest.20230201_154429.jpg

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                    • #40
                      Re: Ptarmigan 17 glued lapstrake yawl

                      Stay tuned folks, the Oughtred Acorn is off the build frame. The Ptarmigan frames and bulkheads are at the boat shed and we'll stand them tomorrow, pics to come.

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                      • #41
                        Nice!


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                        There are two kinds of boaters: those who have run aground, and those who lie about it.

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                        • #42
                          Re: Ptarmigan 17 glued lapstrake yawl

                          beautiful boat

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                          • #43
                            Re: Ptarmigan 17 glued lapstrake yawl

                            As promised, pics from today's efforts. With the use of a laser level we had it trued up pretty quickly and only have the transom and stem to get locked down20230223_121044.jpg20230223_121119.jpg20230223_121130.jpg

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                            • #44
                              Re: Ptarmigan 17 glued lapstrake yawl

                              I suppose the "stringers" really stiffen that up before trying to bend plywood planks on? I read Oughtreds book and he seems to shy away from stringers.

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                              • #45
                                Re: Ptarmigan 17 glued lapstrake yawl

                                Yeah, in a perfect world I'd be building another Oughtred boat but he doesn't do one that suits.
                                The plan is to fit the CB case which will really stiffen up the centre sections, fit a few braces and the stringers and see what further bracing is needed

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