S2 6.7 Junk Rig Conversion

  • 20 Aug 2020 21:15
    Reply # 9179745 on 6872873

    Hi David,

    Thanks for taking the time to respond. I have a stainless tube glued to Douglas fir blocks which are glued to the aluminum mast.

    I am concerned that enough heat to remove the assembly will also ruin the stainless to fir bond. I am using west system epoxy.

    Hmmm. Not sure what to do next. I will consider melting it off and starting over. 

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    Last modified: 20 Aug 2020 21:30 | Anonymous member
  • 20 Aug 2020 20:23
    Reply # 9179655 on 6872873

    Hi Scott, a bit more detail on materials and glue would help, but if epoxy and stainless to wood then application of heat to the stainless will release the joint. A normal heat gun is usually adequate, you need about 250 to 300 degrees celsius.

    All the best, David.

  • 20 Aug 2020 17:02
    Reply # 9179199 on 6872873

    Hi Annie,

    Thank you for the encouragement. It is a big help. The more I work on my project the more I am amazed at how your boat is really a work of art.

    I think I did things too quickly these last few days. I have a hinge glued to my mast now. Unfortunately it ended up 1.5 inches too high up. I built it the way it is in my drawing but I think I measured one thing and then made a drawing of something else.

    I need to remove this hinge that is really securely glued to the mast, or cut off the bottom of the mast or add something to the top of the tabernacle. All these seem I like bad options.

    Does anyone have a better idea how to fix this? 

    Last modified: 20 Aug 2020 17:03 | Anonymous member
  • 02 Aug 2020 03:33
    Reply # 9139330 on 6872873

    Looking at the photo gives me a distinct feeling of deja vu!  You're making good progress, Scott


  • 31 Jul 2020 14:10
    Reply # 9136946 on 6872873

    And 3/8" stainless steel (18-8) threaded rod dry fit to holes drilled in the tabernacle.


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  • 30 Jul 2020 15:39
    Reply # 9135061 on 6872873

    Attached a photo of my tabernacle and mast head in progress.

    I am attempting to follow JRA magazine issue 61 and the photos on Annie Hill's blog for the tabernacle. The mast head is my effort to copy Jami's mast head.

    I was concerned that the tabernacle was not strong enough until all the major pieces were glued together. Now I am pretty sure it is strong, but very heavy.

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  • 20 Jul 2020 22:05
    Reply # 9114860 on 6872873

    I have been thinking about posting an update for a few days. I am concerned that this may read like whining and complaining. So I am going to try to focus on things that I have made me feel thankful recently.

    I feel fortunate that I was able to get one of the four mooring balls at the new marina. They are much less expensive than a slip and a good excuse to have two boats. The Sun Dolphin Water Tender is fun to row around. Unfortunately the marina has a use it or lose it sort of policy. If I don't keep a boat on the ball I lose the spot and the next person gets it -- even after I pay for a season. I think this is good rule overall but for me right now it means I have a sailboat with no rig. I took the original rig off before launching.

    I would also like to thank whoever designed my Tohatsu Sailpro engine. The shift linkage pulls up on the lower unit to shift into forward gear. Turns out the shift linkage is strong enough to hold the lower unit up and in gear. This was important when somehow I ended up in the middle of the harbor with both of the bolts that should be holding the lower unit missing. Last time those bolts were intentionally removed waswhen I had a marine service company replace the impeller two years ago.

    I am thankful that I am using slow epoxy hardener. The local West Marine was out of resin so I ordered it online. The 'can' arrived with a big dent in the side. This seemed to be only a cosmetic problem until I was pumping out the second batch of epoxy for the bi-axial cloth. The bent angle of the top of the can seemed to put some strange stress on the mini pump. The center of the pump pushed through the part that screws on the can and the pump came apart in two pieces. One part was left floating in the can and the other on the floor of the garage. So it was good that the slow hardener gave me some time to throw out the mess, fix the pump and carefully measure a new pot.

    Lastly I am thankful that I do not have to rely on my skills with fiberglass to earn a living. I need to decide if the voids left under the bi-axial cloth need to be cut out and filled back in properly and consider getting a surgeon to remove the glass fiber that is now epoxied into my thumb.

    Still sounds like complaining, I think. But I am happy to be making progress.

    Scott.



    Last modified: 21 Jul 2020 01:27 | Anonymous member
  • 08 Jun 2020 17:29
    Reply # 9022992 on 6872873

    Thank you for the suggestions. If my drawings are correct then the 24' 8" pole should still work for me. I will likely extend it from the top if that becomes necessary.

    I have the mast partners glued and screwed to the boat. I also put six coats of topside paint over the epoxy. I left a small area unpainted where I plan to install the tabernacle. Hopefully this will allow me to avoid grinding some paint back off later. I think the whole thing is now waterproof but the unpainted section is at risk of UV damage. I taped a scrap of plywood on top of it for now, to keep the sun off the epoxy.

    Now I need to finish the tabernacle and the hardware to attach it to the mast. 

    I am thinking about bending threaded stainless steel rod into a U shape such that the radius of the U matches the radius of the mast. The idea is to epoxy this U to the front of the mast with enough straight section on the U to allow a stainless steel plate to bolt on the back of the tabernacle when the mast is raised. There would be two such assemblies. One near the top of the tabernacle and one near the bottom.

    Can anyone come up with a reason why I should avoid bending SS rod this way or any other reasons why it might weaken the structure?

    Scott.

    Edit: I attached a photo. It is not pretty. Maybe I can clean it up some later.

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    Last modified: 16 Jun 2020 03:44 | Anonymous member
  • 22 Apr 2020 08:19
    Reply # 8920813 on 6872873
    Anonymous member (Administrator)

    David T: “The tops of these tapered tubes are generally parallel for a short distance, to enable the lamp-post makers to fit the light more easily, so in fact, getting a good fit for a short extension is no problem.

    That is good news and negates some (though perhaps not all) of the reasons for suggesting that a larger diameter heel plug extension might be better or easier to make than a small diameter topmast extension.

    I sure wish we could get these lamp posts in New Zealand.


    Last modified: 22 Apr 2020 08:27 | Anonymous member (Administrator)
  • 22 Apr 2020 07:33
    Reply # 8920791 on 6872873

    I was in the same position with both Tystie and Weaverbird, wanting my aluminium mast to be a bit longer.

    On Tystie, I made a wooden extension, a metre long, and that was a mistake. It failed due to fatigue (but only after sailing the Pacific from top to bottom). It was the combination of too much length, too little diameter and possibly unsuitable timber that did for it.

    On Weaverbird, I got a 9.2 metre tapered pole, and really wanted just a little bit more. I got my brother in law to turn me a short extension from PVC bar, and drilled and tapped it for M8 screws to fasten on stainless steel eyeplates. This has been entirely satisfactory. The tops of these tapered tubes are generally parallel for a short distance, to enable the lamp-post makers to fit the light more easily, so in fact, getting a good fit for a short extension is no problem. I would choose to do this over making a heel extension at a much greater diameter. Black nylon would be stronger than PVC, and durable hardwood such as oak would also be very good. Since the masthead needs to be capped in any case, this is as good a way as any.

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    Last modified: 22 Apr 2020 08:00 | Anonymous member
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