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Type: Posts; User: MN Dave

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  1. Replies
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    Re: The House Of The Golden Balls

    I will have to agree with the first four points. But the last two apply to conventional construction where there are rarely if ever any vertical seams other than the many butt joints in the siding....
  2. Re: A vessel stability question for the N.A's or designers

    Yeah, that last turn was prolly the last nail in the coffin.

    This: https://www.researchgate.net/publication/279572394_Effect_of_Forward_Speed_on_Ship_Rolling_and_Stability may explain something. I...
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    Re: The House Of The Golden Balls

    If the house wasn't so old, the cantilevered deck would worry me. It would be interesting to know how it is supported and sealed. Don't get me wrong, the house looks fantastic.
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    Re: The Plywood Debate

    In other words, if you forget to apply mold release to a female mold when you lay up a fiberglass boat, you can leave the mold in place and as long as it isn't too heavy? :d

    40 oz makes for at...
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    Re: A trailerable box keel motorsailer

    It did have a box keel. I just told you that in March (#24 :d). I have never found much about it other than the article I read somewhere around 1970 and the description of Sunnie which Atkin said was...
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    Re: A trailerable box keel motorsailer

    Still a very interesting series of threads. I read about Atkin's Matthews Sailor maybe 50 years ago and have wanted one ever since.

    All I have to contribute is the umlaut that you couldn't type...
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    Re: The Plywood Debate

    Fair enough, so aside from cost, how well does exterior ply compare to marine ply and under what circumstances might it be acceptable or not? Not everyone has reasonable access to marine grade...
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    Re: Microwaving frozen epoxy ingredients?

    Science types? Hmm... Perhaps on the second level of the path? First there is a mountain, then there is no mountain, then there is.
  9. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Dody,

    Please tell us that your knee has healed well.

    Dave.
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    Re: Has anyone tried this?

    Sounds like an earworm. Some things are difficult to forget.

    You listed a number of things (much cheaper than glass and epoxy, less mess, easier repairs, no sanding, and just as watertight). I...
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    Re: Microwaving frozen epoxy ingredients?

    If microwave vulcanized bagels are any indication...

    It has been done: https://www.swaylocks.com/groups/epoxy-microwave-disaster

    Water takes a lot more heat than anything else to warm up, and a...
  12. Thread: Sugar Pine

    by MN Dave
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    Re: Sugar Pine

    +1

    While I only tried to make the point that sugar pine and eastern white are virtually identical for practical purposes, I left out the fact that white pine has a long history of use in boats. On...
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    Re: How to delete account

    From the forum or from threads?

    For threads, you can go to General Settings under Forum actions/ at the top of the page and go to Default Thread Subscription Mode: then select Do not subscribe. ...
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    Re: The House Of The Golden Balls

    Don't do it. We like the old Jay and would miss him.

    My daughter called the police when she came home and found that her apartment had been thoroughly ransacked. When the police found the...
  15. Thread: Sugar Pine

    by MN Dave
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    Re: Sugar Pine

    All white pines are rated "heartwood is rated as moderate to low in decay resistance". The only common one rated lower than the rest is radiata pine.

    From:...
  16. Re: Mounting electric trolling motor pod into skeg on a navigator

    It will be a steady push, so probably a lot less force than hitting a rock. You could look at it like a simple lever. The 28# load at the motor has to be balanced by a load in the same direction at...
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    Re: Thoughts on canoe building books

    A good set of plans is the best way to get started, but not the only way. There are a lot of good, very detailed books on building a stripper, Stitch and glue, etc. I tend to think that they may...
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    Re: Bulkhead clips for short ladder

    Jay called them ladder locks, and 'companionway ladder locks' googles up a few images.

    The ones in your picture can come loose if the ladder shifts according to this link:...
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    Re: Which Brass to use?

    Pretty much what Jay and Thorne said. While arguing with Jay is generally not a good idea, on account of him being right most of the time, I will take exception to blaming work hardening for cracking...
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    Re: Cordless Tools - Makita vs. DeWalt

    Two weeks ago I mentioned that I rebuilt a Dewalt battery pack with Tennergy sub c cells. They worked great -- for about 10 - 20 discharge cycles. The little red light on the charger is telling me...
  21. Re: Torque value for Mainifold Flathead 6 M47S Crown Chrysler Marine Engine

    The industrial version of the engine was produced until 1978, so farm equipment parts might be compatible and more readily available.
    ...
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    Re: Pivot for Steel Centreboard

    +1
    Phosphoric acid can remove rust and zinc oxide and leave a phosphate coating that helps paint adhesion. A better phosphate coating solution is a zinc phosphate treatment that leaves a heavier...
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    Re: Galvanic corrosion

    Voltage and water:
    Water is a very complicated substance. It is a loose network of molecules that are linked by hydrogen bonds. Hydrogen bonds wander freely from molecule to molecule. This makes...
  24. Re: Varnish problems with current thinners and brush cleaners

    Jay,
    It seems that Behr discontinued their spar varnish 10 years ago. Are you still using 10 year old varnish? I'm impressed with the stability if it is still working well.

    Well, don't buy any...
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    Re: have you seen one of these?

    There are only a few dozen threads to choose from. This is the most complete list I have run across:
    http://historicmotorcycle.org.au/images/Thread_Tables.pdf


    BRITISH THREADS

    US...
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    Re: Birdsmouth spar calculators

    Now that you mention it, it seems obvious. All of the angle pairs for any number of staves add up to 90°, so this works for any number of staves. Set the blade for one angle and rotate the stock 90°...
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    Re: Birdsmouth spar calculators

    Betcha I could do it. I'm pretty capable of mucking things up.

    There are several ways to muck this up with table saws and router bits:...
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    Re: have you seen one of these?

    bsp is a pipe thread. You said there was a machine screw marked bsp. It could have been the manufacturer's initials, not the thread type. More likely a 1/4-20.

    Try to dig out the screw as Nick...
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    Re: have you seen one of these?

    Are you sure that it is a 1/4 bsp internal thread? According to https://www.valvesonline.com.au/references/threads/ the major diameter of a 1/4 bsp thread is 13.157mm, which is kind of difficult...
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    Re: Expand Wooden Ferrule by 2 mm?

    When the strapping tape dries up or the rubber based PSA turns to goo salvaging the parts is of questionable value. On the plus side, it is well protected so it will take a long time to go bad.
    ...
  31. Re: resorcinol glue...now desperatly seeking supplier

    403 is 413. I had never heard of 413. When I looked it up, they said "WEST SYSTEMŽ 413 (previously called 403) is a mix of cotton microfibre and colloidal silica". Having previously recommended...
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    Re: Cordless Tools - Makita vs. DeWalt

    Any brand can be made yellow. ...
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    Re: Cordless Tools - Makita vs. DeWalt

    I have gotten a lot of use out of my old 18V Dewalt cordless drill and impact driver. This is my second Dewalt drill and first driver. The smaller batteries are short lived, and the old ones with the...
  34. Re: resorcinol glue...now desperatly seeking supplier

    That sounds like an autoclave cured B-stage epoxy. Those epoxies don't fully cure at room temperature and will stay in the fairly solid half-cured B-stage for months if stored in a refrigerator. The...
  35. Re: resorcinol glue...now desperatly seeking supplier

    If you follow Phil's advice, you will still get a decent joint, BUT...


    Filler helps maintain some thickness, in part because the thin resin won't run out of a gap before it sets up. It also...
  36. Re: resorcinol glue...now desperatly seeking supplier

    If you want a long working time, you might be better off with West 105 resin and 209 hardener than G-Flex. It is stronger, stiffer and has a longer pot life. Silver quandong is supposed to glue well,...
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    Re: Galvanic corrosion

    Crevice corrosion under anoxic conditions is still strongly influenced by salinity. But there is always microbially influenced corrosion.
    https://link.springer.com/article/10.1007/BF02835718...
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    Re: Galvanic corrosion

    Almost a non-issue. As Phil said, a fresh water boat that lives on a trailer won't have much to worry about. Ninigret is http://www.atkinboatplans.com/Oar/Ninigret.html

    You need some salt for...
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    Re: Wharram Catamarans , discussion required !

    The Polynesian Catamaran Association might be of interest here: http://pca.colegarner.com/
  40. Re: resorcinol glue...now desperatly seeking supplier

    So anyone over 40 has nothing to worry about?

    Someone here might know where to find your glue; http://fnqflyers.com/local-groups/
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    Re: Fixing unfair steam bent keel

    It looks like the growth rings loop around the knuckle as if there was a knot in the log next to the plank. Maybe it is just saw marks, but in your picture it does look like the grain is running...
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    Re: Galvanic corrosion

    Chris mcm has had a lot to say before:
    Electrolysis In Wooden Boats
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    Re: Galvanic corrosion

    I can't argue with you on any other aspect, but you don't need to form hydrogen gas to drive pH. As long as you generate some imbalance in the ionic concentration, water will dissociate to balance...
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    Re: Fixing unfair steam bent keel

    +1
    If you have much grain runout or any knots, the board won't bend well. The area near the knot bent more because it is weaker than the rest of the board. ...
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    Re: The House Of The Golden Balls

    I hate to be the one to mention it, but surely you primed the zinc before applying the gold. ...
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    Re: Torqedo owners - Heads Up!

    It has been done, the pod in the rudder, not the feathering prop. Phil at http://urbanboatbuilders.org/ knows the details. The design below is a Dispro. We started with a Dippy, but the retractable...
  47. Re: resorcinol glue...now desperatly seeking supplier

    You might find that an aircraft supply house will have resorcinol and would also understand date codes and the need for control over the age of their stock. There must be some homebuilt aircraft...
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    Re: Gick for lid of ballast tank?

    The beauty of a fillet on the inside of the tank is that you can't see it. It looks like you have plenty of surface area to bond. You don't need any glass cloth, just a nice ring of gick around the...
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    Re: Galvanic corrosion

    Too much zinc can make you sink. Bonding isn't always a good idea. Other than that, no argument.
    ...
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    Re: Classic Nav Light lenses needed

    Mea culpa, I meant to say 15- 20 sec. There is a very narrow window between soft and warm and hot runny mess. It can be done.
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