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  1. Thread: Sealants

    by MN Dave
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    3
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    30

    Re: Sealants

    Dap Seal 'N Peel is a quick and dirty sealant that can be removed and replaced when you have had time to properly evaluate the situation. It got my rusted out rain roof through a Boston winter. 35...
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    Re: Skin on Frame in the UK?

    Wetting and stretching balistic Nylon:

    Ballistic Nylon swells quickly when wet. We drape the Nylon over the framework and sew one end. We mark the other end and take it off the framework. when it...
  3. Re: Bernoulli-ism: Little to do with how sails work

    http://l-36.com/tech.php

    ?
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    Re: Stainless Steel Fasteners

    As I said, chloride concentration and temperature are the drivers. Oxygen concentration also plays a major role. Fresh water is a weak electrolyte with a low concentration of chloride. Things still...
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    Re: Keel protection for row boat

    Amazing Goop? Sounds bogus. After perusing the tds, it sounds like it might just work. Epoxy with ceramic beads, Kevlar and graphite. Graphite alone is slick, but isn't much good for abrasion, but...
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    Re: Metal Plate Centerboard

    Aluminum 5032-H32 ~$190 for a 2'x5'x1/4" plate (guessed size for example) Steel is a little cheaper, say $140 for the same size. A new steel plate might cost less than blasting and repairing the...
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    Re: Metal Plate Centerboard

    Oh good, a willing victim!
    The density of a mixture is not hard to calculate from the density and percent by volume. Uniform size spheres can have a maximum packing density of 65%, but as...
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    Re: Exterior ply for trailer sailer?

    Yes and no. For sheathing where you are worried about bouncing off a rock, grain orientation may not matter -- if you can pin down all the variables. It is hard to say how much more flexible a small...
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    Re: Ballast for 16 ft. sailboat

    Googling lead pig civil war got some figures. It seems to vary with the smelter. I found one pig recovered from a shipwreck at 110 lb and a book that mentioned 81 lb from Kennett & Blow and 70 lb...
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    Re: Exterior ply for trailer sailer?

    The face grain direction is important. You made the fir sample sideways. You should see a big difference between panels tested in different directions. You should make another fir sample with the...
  11. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Not too bad? More like excellent. You have hardly ever used the saw and you cut that freehand? You are good.
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    869

    Re: Metal Plate Centerboard

    Yes, and that being the case you're better off using thinner ply and thicker glass.[/QUOTE]
    To Gib's point, fiberglass is less than twice as strong and stiff as the outer layer of wood. It only...
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    Re: Electrolysis In Wooden Boats

    Degradation of Wood by Products of Metal Corrosion
    ...
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    869

    Re: Metal Plate Centerboard

    When I read this, I pictured my dagger board, and my first thought was that it is a bad idea. The outer plies are the ones that carry most of the load and only work well when the load is running in...
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    Re: Drilling lead keel for bolt holes

    Bob is right about the fact that a 3" deep threaded hole should be strong enough to yield a threaded rod, (about 5000 lb each). You don't load keel bolts that much anyway.

    My question based on...
  16. Re: Lightning protection for a wooden boat with dyneema standing rigging

    https://www.woodenboat.com/lightning-ground-systems


    100,000V smarts, but the voltage of lightning can reach 1,000,000,000V and the temperature runs up to 50,000F. So while you might have...
  17. Re: Lightning protection for a wooden boat with dyneema standing rigging

    I agree that it does sound counterintuitive.

    That may be the case if the aircraft is under the cloud and a cloud to ground strike passes through it. In the air, that is apparently not the usual...
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    Re: Drilling lead keel for bolt holes

    Is the keel flat on top? A pine surrogate keel used as a drill guide would be a lot easier to handle. Only the top of the surrogate keel has to be the exact shape. Any taper to the sides and the...
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    Re: Exterior ply for trailer sailer?

    Dynamite Payson was an advocate of exterior ply. http://www.mcssl.com/store/hhpaysoncompany

    I used BCX or ABX fir to build a Gypsy, glassed on outside and most, but not all inside surfaces. No...
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    Re: Picture posting woes

    I can turn the box on and off. I can not explain much of anything about what makes it work.

    I think that 'smart' mobile devices have tilt meters that automatically rotate images without changing...
  21. Re: Lightning protection for a wooden boat with dyneema standing rigging

    I am not arguing with navydog. Just answering the question.

    On average, all commercial airplanes get hit by lightning more than once every year. ...
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    Re: masthead fitting

    My point was that removal will not be a trivial exercise, and having the thing twist is not going to be a problem. It doesn't sound like a hollow mast where anyone will have to pop it off to access...
  23. Re: What is the upper size limit for singlehanding, for someone in his sixties?

    A good companion book would be about preparing the aging sailor for the boat. :D[/QUOTE]I was not really joking here.
    The ageing process is a huge factor. and the OP's question has to be ...
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    Re: Picture posting woes

    What program did you use to rotate them? It seems to make a difference because the results seem random and I don't see a lot of detail as to which program was used to rotate and save. Could be I...
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    Re: masthead fitting

    If the gaps are completely filled with 5200 the joint will be extremely stiff because the elastomer is constrained by the rigid surfaces that it is bonded to. The hard part will be filling the joint...
  26. Re: Epoxy sheathing a cold-molded Sparkman Stephens - is fibreglass necessary?

    TITTB Paul. Follow the link: #1

    This is an excellent segue to a proposal for a Take It To The Bilge (TITTB) thread. A new wastebasket for flaming and thread drift where arguments can...
  27. Thread: Tittb

    by MN Dave
    Replies
    1
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    188

    Tittb

    From #41

    Ah, an outraged 'expert' who knows nothing of the person he flames. This is an excellent segue to a proposal for a TITTB thread. So you should Take It To The Bilge where we can flame...
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    Re: Skin on Frame Peapod

    No, Stefan is the most efficient.
    http://flo-mo.weebly.com/three-sheet-boats.html
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    Re: Skin on Frame Peapod

    19360
  30. Replies
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    Re: Not wood, but goode.

    Interesting. The bottom profile looks a bit like Weston Farmer's Trumpet.
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    Re: Anchor for rock quarry

    Since the OP returns frequently to the same place, a pile of suitable rocks piled near the shore would provide a supply for rock bag anchors. Bring a new smooth rock each visit until the supply is...
  32. Re: What is the upper size limit for singlehanding, for someone in his sixties?

    A good companion book would be about preparing the aging sailor for the boat. :D
  33. Re: Epoxy sheathing a cold-molded Sparkman Stephens - is fibreglass necessary?

    You are fortunate that this is not about a cat boat or catamaran because I would have had to start out with "There is more than one way to skin a cat".

    I am NOT RECOMMENDING sheathing. I am...
  34. Re: Epoxy sheathing a cold-molded Sparkman Stephens - is fibreglass necessary?

    I would lean toward the ain't broke don' fix it side. Thin glass sheathing can be cut fairly easily. Once the sheathing is cut, the water can get behind it and cause a lot of trouble. A 37' boat ...
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    Re: ash for small boat frame

    There is not much difference between European and American ash. http://www.wood-database.com/european-ash/ In spite of the lack of rot resistance, ash is a nice wood to work with.

    Ash does need...
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    Re: Hotwire an old electric trolling motor?

    Sounds good. Some waterproofing might be needed? I looked at it again and then the video from the other trolling motor post https://www.youtube.com/watch?v=I5xTHJBuV1Q The wires on the 80 lb Minn...
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    Re: Stainless Steel Fasteners

    This is the only part that I disagree with. Chloride concentration and temperature are important. http://www.ssina.com/corrosion/crevice-pitting.html

    <<<EDIT: ...
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    Re: Silver Quondong and/or Douglas Fir

    Yes, I thought it was amusing. I tried to look up something about the woods discussed here and found a recommendation to look here, which lead to the same people and all the way back to myself....
  39. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    What happens to borax? You already described it as well as I can. I prefer Nick's link to the one I have here.

    I spent nearly a minute skimming this paper, and I think it might answer your...
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    Re: Craigs list beauty!

    https://boston.craigslist.org/gbs/boa/d/25-classic-wooden-sailboat/6637557140.html
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    Re: Hotwire an old electric trolling motor?

    Like this?
    DC Motor Speed Controller, Motor Driver Speed Control Board for Brush Motor 9V-60V 20A 1200W High Power PWM Controller DC 12V 24V 36V 48V 60V Regulator Dimmer Governor Pulse Width...
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    Re: Silver Quondong and/or Douglas Fir

    OK, wrong side of the planet here, but I couldn't resist:
    From www.boatdesign.net
    Thread: Tree species for a big mast
    :D
    Taking that advice, I found this:
    Thread: Hoop pine mast ?
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    Re: Sheathing with solid lumber

    Don't you mean diesel oil trees? Copaifera langsdorfii You can run yer diesel on the sap. Talk about firewood.
    You never did get over the awkward place that Dave Carnell put the ethylene glycol....
  44. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Dody, you have been too long without a car. Your car has roof racks. I don't see the crossmembers, but wooden ones will suffice. You could have tied the board to the roof rack in one piece. It was...
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    Craigslist treadle lathe

    https://minneapolis.craigslist.org/hnp/tls/d/vintage-wood-lathe/6614599612.html

    https://images.craigslist.org/00707_b43oH2jFwCs_1200x900.jpg
  46. Re: Trolling motor trouble: No reverse. Suggestions?

    The stiffness might be what fried the reverse circuit.
    No signs of anything rubbing? Slathering trashed bearings with molybdenum disulfide grease can delay failures.
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    Re: dressing an anvil

    I suspect that this is a -- Good bye.

    After subtracting the shipping cost* from the $150, this is the cheapest lump of scrap iron that can be shipped half way around the world. Buthardened...
  48. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Gorilla glue is also polyurethane and it foams a lot. The more a glue foams the weaker it will be in a loose joint. Simple rule of mixtures, If half of the glue area is air bubbles, it will be half...
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    Re: dressing an anvil

    https://sacramento.craigslist.org/search/tla?query=anvil
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    Re: dressing an anvil

    Worth reading before you do anything to the anvil: (It pretty much says DONT! unless you really have to)

    http://www.anvilfire.com/article.php?bodyName=/FAQs/anvil-3.htm

    First page because...
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