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Type: Posts; User: MN Dave

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    Re: The Strength of Scarf Joints

    It is interesting that the high ratio (>8:1) scarphs stiffen and strengthen the joint. That implies that laminated wood (infinite scarf ratio) will be stronger and stiffer than solid. Note that in...
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    Re: Early American Shipbuilding Tools Book Online

    The easiest way to rotate is to open with windows photo viewer and rotate it. It automatically saves the rotation.

    "I could swear it groaned when I opened the lid." Your back?
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    Re: Re-building my Ketch Tonga (1960)

    Not sure? Not surprising. Every tine I look at this I find a different answer.

    If you look at the Albizia pictures on Hobbithouse, most don't seem to match well, partly because it appears that...
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    Re: What’s wrong with this picture?

    She thought he was cute.
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    Re: The height of a canoe at its widest point

    A good book on building strippers is a good idea. I just left it to the rest of you to jump in with some good recommendations.

    You can make a perfectly good canoe that is less than a masterpiece....
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    Re: The height of a canoe at its widest point

    You need to loose the s after http http://grandpasarchive.com/boatplans/canoes/redwood-canoe.pdf

    The infamous redwood canoe from the 1964 Popular Science. It looks like a Grumman aluminum canoe....
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    Re: Early American Shipbuilding Tools Book Online

    Found a better link to the tool books:
    http://www.toolsteach.org/5handtoolshistory.html
    If you poke around, there are links to the full pdf of some of the better ones.
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    Re: What’s wrong with this picture?

    Do you have another pic of those oars?
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    Re: Re-building my Ketch Tonga (1960)

    You seem to have found a very nice port to have been laid up for several years. Some supply problems, but quite a place to visit.

    Epoxy should not permeate wood. It is difficult to work with...
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    Re: Refastening with treenails

    You shouldn't do that.
    Ships' Fastenings- From Sewn Boat to Steamship - [PDF Document]Index
    treenail (also trennal, trunnel, trenayl), 20,

    25–27, 46, 48, 58, 63–68, 66, 97–100, 123,

    124,...
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    Re: Refastening with treenails

    The horse is dead and I am still beating it. With apologies, I would like to submit an old definition as a segue to introducing a collection of material that may be of further interest....
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    Re: Early American Shipbuilding Tools Book Online

    Bump. I was disappointed that this thread was all about the adze, and no one seemed to like the book. It looks like the link was one that only works after the computer has eaten enough cookies from...
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    Re: Refastening with treenails

    Nick,

    What is a dump? I know the word as a place to leave something you don't want and a euphemism for something you leave behind in spite of saying that you took it. I have never sought to use...
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    Re: Cautionary tale

    Just a thought -- checking all the boxes without knowing where it will go. That wasn't the sunny side of the boat was it?
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    Re: Refastening with treenails

    This link should be dropped on a timber frame shop thread: Historic American Timber Joinery A Graphic Guide Well illustrated.

    Back to the question of what is the best wood to use that is available...
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    Re: Re-building my Ketch Tonga (1960)

    When you go to bend some thicker pieces, there are a lot of videos out there. This one explains the function of the compression strap nicely and at about 9 minutes shows some examples of compression...
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    Re: Refastening with treenails

    I went. I figured. I found Ship-building in Iron and Wood, MDCCLXIII. Is that preferable?

    The link takes you to a page that says that they used temporary iron screws to plank the ship, then...
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    Re: Refastening with treenails

    English Oak seems to be a traditional choice.
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    Re: Refastening with treenails

    The best rationale for the discrepancy between spelling and nautical pronunciation that I have heard is that alcohol was involved.:arg I have almost always heard it pronounced as trunnel.
    ...
  20. Thread: Bendng

    by MN Dave
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    Re: Bendng

    I think the OP was talking about making the video, not posting the link.

    As rank amateur photographer myself, I can only give some very limited advice. Professional photographers take dozens of...
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    Re: Re-building my Ketch Tonga (1960)

    If by cling wrap you mean the plastic film sold for wrapping food, the results might vary from one brand to another. You would be surprised at the variety of plastics used and the level of effort...
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    Re: Nida core layup

    That was not a recommendation. That was just the style cloth used in the example where someone was looking at the trade off between 1/2" plywood and a Nidacore deck....
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    Re: Nida core layup

    Nidacore already has a mat bonding layer on the surface.
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    Re: polyester resin adherence

    I trust your experience and observations, but I am not confident that I could reproduce the same results without knowing a few more details. I have two question that need to be answered for polyester...
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    Re: Nida core layup

    First question: "How much of a layup do I really need?"
    I don't know. I can estimate the weight, but the strength needed to resist a strong wind gust is not something I would be able to estimate. I...
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    Re: Re-building my Ketch Tonga (1960)

    Not immediately useful, but for general information. You mentioned using an inverter for running a US 120V steamer (off a DC power supply?). A better choice for shore power would be a step up step...
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    Re: What is the copyright of old boat plans?

    Not exactly on topic, but the MIT Hart Museum NGH collection has been digitized. the copyright info is below the images
    https://collections.mitmuseum.org/?s=Class+744

    Even further off topic, a...
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    Re: Re-building my Ketch Tonga (1960)

    There are only a few possible types of plastic used for anything like this. The last one is almost certainly polyethylene (polythene(UK) or polietileno(Portuguese)). Since you already know how they...
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    Re: polyester resin adherence

    In the UK there is a powder bonded CSM that is compatible with epoxy. I didn't find a good term to search for a similar product in the US. Nordstrom fgm-450a-diy05 is available on Amazon. There is...
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    Re: Re-building my Ketch Tonga (1960)

    I have to agree. You can spend an eternity learning every detail. This is another 16 page bit of light reading to help you procrastinate: https://www.leevalley.com/us/html/05F1501ie.pdf On the first...
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    Re: Epoxy bonding to Linseed oil

    I suppose that watching racing Hondas is better, but not by much. Nothing like a cold wet summer day wasted on a non-event. One rainy afternoon in '75 I watched a SCCA showroom stock sedan race at...
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    Re: Re-building my Ketch Tonga (1960)

    I suggested a convenient* source of steam. There is always creative. Steam is steam.
    http://lightweightboatbuilding.com/custsribs.html
    http://lightweightboatbuilding.com/images/custom/32.jpg...
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    Re: Re-building my Ketch Tonga (1960)

    I had intended to add a link to the words 'wallpaper steamer'.
    https://www.amazon.com/s?k=wagner+705&i=tools&ref=nb_sb_noss_1
    The picture is a 715. The 705 has a more squared off top....
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    Re: Re-building my Ketch Tonga (1960)

    I have used PVC drain pipe at urbanboatbuilders.org/ for steam bending and it does sag somewhat after a while. They generally just use polyethylene flat tubing now. It comes in a roll and they throw...
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    Re: Re-building my Ketch Tonga (1960)

    Hot pipe bending

    https://www.youtube.com/watch?v=FEF4d-bDKOg

    This archery bow bending forum looks informative, but it isn't my problem, so I'm not feeling enthusiastic enough to read the whole...
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    Re: Fuel tank material

    I skipped to the end. The tank wasn't half finished and it looks like you have to be a paid subscriber to see part two.

    West said somewhere, you shouldn't but if you are going to do it anyway, ...
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    Re: Nida core layup

    Typo? "Was going to use 1/" Okume" Maybe "Was going to use 1/2" Okoume"

    Weight: Nidacore 5 lb/cu.ft. So 3/4" x32 sq.ft. = 24" = 2 cu.ft. 10 lb. Add 12-15 lb for 36 oz cloth or half as much for 10...
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    Re: Can't sell home built in Pennsylvania?

    Now now, Bruce, this is for the Bilge.
    https://www.youtube.com/watch?v=gdChJwDKFmI
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    Re: Can't sell home built in Pennsylvania?

    The PA code doesn't seem to say that it can't be sold. Just that you need a bill of sale for the major components when you apply for a title.

    <center>...
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    Re: Re-building my Ketch Tonga (1960)

    Nice 'Sawzall'.

    I think that you worried too much about laminating. Since it appears that you will have the laminations cut before you read this, you already know that you didn't have much to...
  41. Thread: Epoxy problem

    by MN Dave
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    Re: Epoxy problem

    Dynel will not yield a clear finish. For pictures of various fabrics with epoxy look here: http://www.oneoceankayaks.com/Abrasion.htm
    The pictures include Syntex, which was a brand of UHMWPE fiber...
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    Re: Re-building my Ketch Tonga (1960)

    https://www.westsystem.com/the-gougeon-brothers-on-boat-construction/

    I had to read Uhlig's "Corrosion" from cover to cover, all 500 dull pages. We don't want to do that here. A 20 page summary...
  43. Thread: Epoxy problem

    by MN Dave
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    Re: Epoxy problem

    The difference between plywood and strip is interesting. Plywood has more uniform expansion in different directions (except thickness) Strip will expand 10 times more laterally than lengthwise.
    ...
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    Re: Mast repair -mixing wood species

    Your link is missing a few characters.
    https://www.woodmagazine.com/woodworking-tools/hand/the-stanley-57-core-box-plane
  45. Thread: Epoxy problem

    by MN Dave
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    Re: Epoxy problem

    I don't disagree with Gib's assessment of Todd's expertise in general. Glassing wizzard? Yes. Writes much better than me? Yes. I do disagree with Todd's conclusion that the fibers are broken based...
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    Re: Rigid epoxy or flexible epoxy ?

    The flexibility of the epoxy is not important in this application. Before I continue, the OP is talking about bonding wood. I am going to talk about entirely different materials because that is...
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    Re: Mast repair -mixing wood species

    When mixing wood I would worry most about differences in stiffness and swelling. If one piece is a lot stiffer than the rest, it could cause a stress concentration where they join. Using a long scarf...
  48. Thread: Epoxy problem

    by MN Dave
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    Re: Epoxy problem

    It looks like what they call measeling in printed circuit boards. The epoxy absorbs moisture and at much higher temperatures than this boat could have seen, the moisture forms little steam bubbles....
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    Re: Re-building my Ketch Tonga (1960)

    Having written all of the palaver below, I am leaning toward questioning the need for a knee or recommending this:

    Stainless can have some corrosion problems that can be hard to understand. In...
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    Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    You can add me to the list of supporters who haven't had anything to add lately.

    Looking at the photos of the extended stern, I don't see limbers. It may just be the camera angles, but those...
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