Search:

Type: Posts; User: MN Dave

Page 1 of 20 1 2 3 4

Search: Search took 0.03 seconds.

  1. Replies
    5
    Views
    183

    Photobucket workaround to view old pics

    While trying to sort out the building of a new Tyvek (Sorry Todd, I'd see if you were back in business, but cash flow...) balanced lug for a Bolger Gypsy...

    OK, the pics were gone from the post...
  2. Replies
    14
    Views
    472

    Re: Glued lap-dark paint, any worries?

    Ian's dark green paint had an interesting pigment mix. It was apparently not so dark in the IR end of the spectrum. Some dark greens are not as cool as that Kirby's paint.


    That all depends on...
  3. Replies
    17
    Views
    739

    Re: Batteries have me stumped

    This may help: https://www.nyc-arecs.org/batt1.pdf

    Where they show two 12V chargers, you could use one charger, and connect it to one battery (set) at a time. It will take longer, but the way...
  4. Replies
    14
    Views
    472

    Re: Glued lap-dark paint, any worries?

    Those surfaces can easily hit 180°F in the sun. The laps will probably not come apart, but they will be weaker until they cool off. In my opinion, a dark color is not the best idea. My old redwood ...
  5. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    This helps with the more common words. https://translate.google.com/
    It doesn't get all of them, but this list it gets about half:
    From Portuguese: Wenge, Faia, Cerejeira, Nogueira, Casquinha Riga...
  6. Replies
    22
    Views
    543

    Re: Sealant comments please

    +1
    Only comment on this, NOT to argue with using 3M 4000, just a FYI: There is one hardware store silicone that will stick to the shower stall. It is GE-55 in a red tube and located with the...
  7. Replies
    24
    Views
    802

    Re: A silicon based paint ?

    In the day late and a dollar short department, there is one siloxane based, not silicone, that is unbelievably scratch resistant. http://www.adv-polymer.com/MarineLine-coatings-784.asp You can't grit...
  8. Replies
    12
    Views
    473

    Re: Metal gusset material

    +1 for G-10/FR4. FR4 is flame retardant G-10 and may be easier to get. Aside from the color, that are essentially the same.

    Aluminum: 5052-H32 or H34. It is not as stiff as steel, but you can...
  9. Replies
    18
    Views
    906

    Re: Resealing Lexan glass in a hatch I made

    There are a couple of things that might help here for fogged plastic:
    Mothers polish plus 303 protection spray, (they only make a brief mention of 303 at the end):...
  10. Replies
    33
    Views
    1,232

    Re: Lead keel construction method

    Sorry, you did say. Like a larger version of this then? http://images.boats.com/resize/1/5/40/6050540_20161219115401289_1_LARGE.jpg?t=1482176900000&w=600&h=600
    As for the time to build...
  11. Replies
    27
    Views
    1,121

    Re: How long can you anchor?

    Google fu: first hit on 'time limit anchoring washington'
    http://apps.leg.wa.gov/wac/default.aspx?cite=332-52-155

    It looks like 30 days. Then you have to move 5 miles away. It doesn't say how...
  12. Replies
    20
    Views
    1,536

    Re: Pine tar: acceptable brands

    Another source. I think you can call for a larger container. I've seen 5 gallons.
    http://shop.skinboats.com/Coreys-Bio-Blends_c22.htm
    No. Carbonized is more or less burnt. But yes, there is a...
  13. Replies
    33
    Views
    1,232

    Re: Lead keel construction method

    is plywood to a traditionalist.

    You are only talking about 3" +/- removable plank, so just how deep would the final keel be? A better description of the final geometry would help. Moving the CG...
  14. Replies
    33
    Views
    1,232

    Re: Lead keel construction method

    Lead antimony is not as strong as a small, perfect specimen of dry white oak. As for a large wet timber with the knots, checks and other flaws, the casting is likely to be at least as strong, or...
  15. Replies
    45
    Views
    8,354

    Re: Picture posting woes

    I met Scot at the WBS a few years ago, and he does seem to be a pretty decent fellow. As for banning pcford, Scot really hates doing it, so he will have to do better than criticizing your painting...
  16. Replies
    45
    Views
    8,354

    Re: Picture posting woes

    Looking for pair.com, I found a review of free hosting sites, http://blogpros.com/blog/2016/03/host-blog-images-free that describes a little bit of some of the sites mentioned here and on the related...
  17. Replies
    18
    Views
    906

    Re: Resealing Lexan glass in a hatch I made

    Pictures not visible in Firefox.
    The sikaflex PU and alcohol cleaning worked so far. It might not be the PU Sika recommends, but it is hard to argue with success. I think the backer rod was a very...
  18. Replies
    12
    Views
    3,282

    Re: Skin on frame-pvc fabric repair

    My list of sources for PVC and Hypalon. I have a list. What I don't have is first hand experience with any of these. They were the ones most recommended when I looked on raft repair sites:...
  19. Thread: Epoxy Question

    by MN Dave
    Replies
    21
    Views
    1,092

    Re: Epoxy Question

    I just intended to poke a little fun at the way some people get about their favorite epoxies. It was both a warning that some critical responses are to be expected and a suggestion not to jump too...
  20. Replies
    122
    Views
    11,849

    Re: Why not more interest in pedal power?

    This is one I haven't seen before. https://www.wildernesssystems.com/au/products/helix-pd%E2%84%A2-pedal-drive
    It has a spring to kick it up and folds forward out of the way, so the problems of...
  21. Thread: Epoxy Question

    by MN Dave
    Replies
    21
    Views
    1,092

    Re: Epoxy Question

    OK, you asked for it.:arg Brand loyalty is a problem here. Criticizing someone's favorite epoxy is almost as bad as arguing about politics in the bilge. Some folks feel that we owe their favorite a...
  22. Replies
    4
    Views
    367

    Re: Keel Bolts - What grade steel?

    I would go with a lower grade of steel. Keel bolts need more toughness than strength and the lower strength grades hsve less problems with things like hydrogen embrittlement and stress corrosion...
  23. Thread: Epoxy Question

    by MN Dave
    Replies
    21
    Views
    1,092

    Re: Epoxy Question

    Yes. it is a good plan.

    I have used DWX with slow hardener once to repair/replace some shattered plywood, gunnels and a frame where my Gypsy hit a tree after it blew away last winter. It took a...
  24. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Fiberglass is probably more than twice as strong and stiff for a given thickness as plywood. Laying up 18 mm of plywood to replace 11 mm of fiberglass will... take me a while to work out? I am back...
  25. Replies
    20
    Views
    869

    Re: flattening oil paint?

    :D

    You get slightly different google search results for flatting and flattening, and flatting seems to get far fewer but more technical hits.

    So here is what I know:
    1 - Adding a fine powder...
  26. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    The math for paints stiffening the strips isn't what you would expect. Wood is a lot stiffer than varnish or epoxy, and the added thickness, 0.025mm, on each side of 6mm works out at maybe 1%...
  27. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    After rereading the OP
    One layer of plywood, held only with nails and it lasted 57 years? It may be best to allow the planking under the plywood sheathing to work as it shrinks and swells by not...
  28. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    I found the threads I was thinking of.
    http://forum.woodenboat.com/showthread.php?202830-Bowdidge-style-strip-planking...
  29. Thread: Boat Shed Loft

    by MN Dave
    Replies
    17
    Views
    1,217

    Re: Boat Shed Loft

    Collar ties are only redundant when there are ceiling joists to take the thrust load at the bottom end of the rafters. The rafters will want to push the walls outwards when there is a snow load on...
  30. Re: Wood - Plywood - Epoxy bond, re-building my ketch Tonga

    Have you tried this test on a board treated with the linseed oil and preservative the same way you treated the new planks?

    There was a thread here in the last year about a boat builder who...
  31. Re: Bolting fittings to plywood cabin to avoid water intrusion.

    There is an automotive product that is similar and looks to be available on your side of the planet. Permatex #2 is a mix of clay, rosin and castor oil thinned with alcohol whereas Dolphinite is a...
  32. Re: Bolting fittings to plywood cabin to avoid water intrusion.

    Dolphinite USED TO contain a fungicide. There isn't anything listed on the MSDS that kills fungus, and there isn't much of anything that kills fungus that isn't hazardous enough to be required on a...
  33. Re: I have a forty year old teak over ply deck. It's not bad. But, seriously...

    Two part polysulfide is available from aircraft suppliers. The most likely one for this application is AMS-S-8802 Sealing Compound, Temperature Resistant, Integral Fuel Tanks and Fuel Cell Cavities,...
  34. Thread: Shop floor.

    by MN Dave
    Replies
    52
    Views
    3,874

    Re: Shop floor.

    6 feet of muddy water will be fun to clean up after. In this picture: ASF barge there is a two story timber frame shop and office on a very simple steel frame barge similar to a swimming float with...
  35. Replies
    4
    Views
    458

    Re: What is an OST nut or coupler?

    When you coat threads, the coating changes the effective diameter by four times the coating thickness, so you need oversized threads. Not that I knew they were called OST, but it makes sense. ...
  36. Replies
    9
    Views
    712

    Re: Detail for Crime Fiction

    If you don't want anyone to see the patch, use hide glue. :D My daughter the recently minted luthier figures it should let go pretty quickly.

    PVA is also worth a shot, never ignore Peter's...
  37. Replies
    40
    Views
    2,271

    Re: Diesel fuel sludge questions

    Fungus?
    https://www.practical-sailor.com/issues/35_7/features/Diesel-Biocides_5800-1.html
    http://www.bp.com/content/dam/bp-country/en_au/media/fuel-news/fungal-contamination-diesel-boats.pdf
  38. Replies
    37
    Views
    1,896

    Re: Please complete this diagram...

    Google-fu expertise disclaimer. I don't know jack about this.
    This company looks like it might be able to help: http://www.tadiesels.com/index.html

    I read H/EX as heat exchanger, not exhaust. ...
  39. Thread: Shop floor.

    by MN Dave
    Replies
    52
    Views
    3,874

    Re: Shop floor.

    Bummer! Having worked on both wood and concrete, concrete is a PITA.

    Like Hugh, I have a concrete shop floor and a budget. Add to that a poorly graded class 5 limestone gravel driveway and the...
  40. Replies
    24
    Views
    2,891

    Re: An iron keel issue

    Devcon Z was a good idea, but it appears to have been discontinued.

    http://www.devcon.com/ does not list it anymore, but the old (2004) MSDS is still around.

    The best replacement would be...
  41. Replies
    28
    Views
    1,725

    Re: Gaff Thrust and the Hollow Spar

    Spruce: A Colorado blue spruce mast would be a surprise, but you never know. I did find one site calling white spruce (Picea glauca) blue spruce, but it was the only one. Oh well, common names can...
  42. Replies
    105
    Views
    6,719

    Re: Mast inspection questions

    Fitting graving pieces with routers: https://www.youtube.com/watch?v=kZpp9ym_6yQ
  43. Thread: Neat Idea

    by MN Dave
    Replies
    8
    Views
    1,225

    Re: Neat Idea

    This does a bit better on land, but I still wouldn't call it heavy duty:
    https://www.youtube.com/watch?v=ZStHFnAudL4
    This is heavy duty:
    https://www.youtube.com/watch?v=l94arUeh1XI
    But they...
  44. Replies
    28
    Views
    1,725

    Re: Gaff Thrust and the Hollow Spar

    You only loose a fraction of the theoretical strength in bending. Since the outside of the cylinder is supporting almost all of the bending loads, the core is mostly along for the ride. There are...
  45. Replies
    17
    Views
    3,424

    Re: "Faering" for singe rower: hull proportions

    Bump!


    Did I miss a thread in which you described the design you settled on?



    Gerrie Warner still sells plans for the Årby Gård Viking canoe. The website with contact information is...
  46. Replies
    27
    Views
    1,337

    Re: Split in solid mast-Alden 21 double ender

    OK, so the chain saw wasn't the best idea. It could clean out the crud and recontaminate with bar oil. Steve's suggestions are good. I.e. handsaw and have a good look at the wood. Short of removing...
  47. Replies
    27
    Views
    1,337

    Re: Split in solid mast-Alden 21 double ender

    In the picture on the left, there are some light spots along the crack that look a bit like reflections. Is that is actually light shining through the mast? Wow. Holy (insert expletive of choice...
  48. Replies
    52
    Views
    4,804

    Re: Rogue waves & yacht design

    So I'm thinkin' gee that sounds like a soliton. But other than smoke rings, I can't put my finger on how it would work, so I googled it. Still don't know.
    ...
  49. Replies
    52
    Views
    4,804

    Re: Rogue waves & yacht design

    Ian answered the question. The rogue is not one wave, it is several waves adding up when they all pass the same place at the same time. All of the smaller waves continue on. Sometimes several waves...
  50. Re: Advice on Storage of our Carvel Plank Boat - ashore for long term

    +1
    Borax and borates are excellent at preventing rot, mold and insect damage, but don't swell wood very much. While maintaining a steady high humidity will keep the wood from shrinking, it takes...
Results 1 to 50 of 1000
Page 1 of 20 1 2 3 4