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  1. #121
    Join Date
    May 2003
    Location
    South Oz, the big smokey bit in the middle
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    63
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    4,377

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    Finished pfaffing about with the bulkheads today. All cleats and frames glued on (I hope, if someone looks at the photos and thinks I've missed one, please say so before it's glued into the boat ). Bevels planed. Sharp edges rounded off courtesy of my wee trimmer router - you'll note that I even did the edges inside the floatation tanks for reasons of neatness more than anything else. Excess poxy cleaned up as best possible and the whole lot sanded smooth.

    They look at lot worse in the photos than they do in real life thanks to the flash but you can clearly see where there are poxy smudges - this is why the effort taken to mask off with tape pays off. I didn't worry because I'll be painting her but even so, it's not a good look now.

    It's bloody hard to get into those really sharp corners so my cleanup is basic at best. Nearly all of them are inside tanks so it doesn't matter too much but don't go imagining you can be mucky when gluing and clean up later - the photos show the results of that attitude

    Next step - coat them all with three coats of poxy, then I can start thinking about a dry fitting of the hull

    Richard

  2. #122
    Join Date
    May 2003
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    South Oz, the big smokey bit in the middle
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    63
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    Mik, the intention is to build this as per the plans so if you see any deviation from the plans, please say so coz it's a stuff up

    Richard

  3. #123
    Join Date
    Mar 2006
    Location
    Mildura, Victoria
    Posts
    1,407

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    You must be pleased with the progress so far - I think you are doing great.

    soth

  4. #124
    Join Date
    Jul 2008
    Location
    Fenwick, Michigan
    Age
    71
    Posts
    908

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    The bulkheads look great!

    I went about building my bulkheads using a different sequence. I masked off the frame locations and pre-coated the bulkheads.



    Next time I would tape the entire area for the framing. I don't know how epoxy migrated to where I didn't want it, but it surely did - a little clean-up before the epoxy set up and a little sanding before the frames went on took care of it.

    Then I cut and glued (epoxied) the frames to the bulkheads. There was still some clean-up of pushed out goop, but that wasn't too bad. Yes, I had to coat the framing with epoxy but that wasn't bad either.

    Bob

  5. #125
    Join Date
    Mar 2006
    Location
    Mildura, Victoria
    Posts
    1,407

    Default

    Thanks for that post Bob - you've answered a question for me.

    soth

  6. #126
    Join Date
    Jul 2008
    Location
    Fenwick, Michigan
    Age
    71
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    908

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    Well, thank you, soth.

    If something I posted is in any way helpful to anyone, I am flattered. I have been taking help and information from this community for long enough without giving anything back. It is about time I return a wee bit.

    Bob

  7. #127
    Join Date
    Jul 2005
    Location
    'Delaide, Australia
    Age
    60
    Posts
    8,117

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    It is really interesting how even a simple comment from someone building can help someone else. I encourage everyone to publish or perish )

    This is not to mention that sometimes the advice is both sophisticated and direct. One thing that happens if you write too is that improves your own education ... something i greatly depend upon!

    MIK

  8. #128
    Join Date
    Jun 2009
    Location
    Brisbane
    Posts
    79

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    I am interested in other peoples tecniques. I had never thought of using masking tape to stop pre coat epoxy going to glue areas. (I wasnt listening to the teachers at boatbuilding pre- school was I) This means I probably havent read MIKs plans properly either
    I have a proper 2 day weekend next weekend so I hope to get a bit done myself.
    Keep up the good work Richard

    Tom

  9. #129
    Join Date
    May 2003
    Location
    South Oz, the big smokey bit in the middle
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    63
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    Getting in early with my excuses

    Today was spent researching the boat that will come after the Little Black Dog.
    Tomorrow is my Mum's birthday and I'm taking her to tour the Haigh's Chocolate Factory ... complete with samples
    Tomorrow is probably going to be cold and miserable again (they're predicting fine and 18C so I'm guessing more rain and high winds ) and the job at hand will be coating the bulkheads - I need all day in decent weather so I'm taking the opportunity to use my Mum's birthday outing as an excuse not to do anything on the boat.

    Richard

  10. #130
    Join Date
    Jan 2009
    Location
    São Paulo, Brazil
    Posts
    47

    Default Masking tape

    Quote Originally Posted by tomtre View Post
    I am interested in other peoples tecniques. I had never thought of using masking tape to stop pre coat epoxy going to glue areas. (I wasnt listening to the teachers at boatbuilding pre- school was I) This means I probably havent read MIKs plans properly either
    I have a proper 2 day weekend next weekend so I hope to get a bit done myself.
    Keep up the good work Richard

    Tom
    Encouraged by Mik´s note on sharing and the above masking tape comment, someone might be interested that I am now using blue masking tape to mark out long curves on the spars, rather than the baton/pencil technique. I actually find it quite difficult producing a long fair curve with a baton on a stick over 3m long without putting nails into the wood so decided to use the blue tape instead. I can correct the curve easily and the contrast between the blue and the wood makes spotting bulges, etc when sighting down the stick pretty easy. I then plane away and when I start to see any sign of tearing up the blue tape, I know I have got to the right line. Especially when planing a yard or boom when you cannot keep an eye on both sides without going cross-eyed. I have a couple of photos of the process which I will post if anyone wants.

    Now someone will tell me that this approach has been in use in Australia for the last 50 years - but, oh well!

    Steve

  11. #131
    Join Date
    Mar 2006
    Location
    Mildura, Victoria
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    "..................this approach has been in use in Australia for the last 50 years"

    soth.

  12. #132
    Join Date
    May 2003
    Location
    South Oz, the big smokey bit in the middle
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    63
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    Da doggie got sticky again today

    Three coats of West System, wet on wet, applied to one side of the bulkheads. I'll flip them tomorrow and do the other side.

    For those of you coating the panels and then fitting the frames, may I make the following observations:

    - it's bloody hard to get into those tight corners and do a decent job so they have been ... well coated
    - although coating flat panels first saves the problems in the above point, I found that when coating the framing, you necessarily got epoxy on the flat areas which would need cleaning up, sanding and which would lead to the above raised point
    - I made plenty sure that the join between the frame and the flat panel was well coated which would exacerbate the first point made.
    - sanding those flat panels is going to be hell thanks to the existance of the framing

    All in all, I think my way of assembling and then coating is better but the difference isn't that great and probably comes down to personal abilities and attitudes. In this case, I'm a mucky bugger and seeing the tight corners are all inside tanks, I don't really give a flying fruit bat about how well they get sanded

    Richard

  13. #133
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    Mar 2006
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    Mildura, Victoria
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    For my further education, Richard, what aplicator are you using?

    soth

  14. #134
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    May 2003
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    South Oz, the big smokey bit in the middle
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    Quote Originally Posted by masoth View Post
    For my further education, Richard, what aplicator are you using?

    soth
    I've got a piece of plastic about 1.5mm thick, 80 - 100mm wide and 150mm long. It's stiff. I like it because it's stiff, because the dried epoxy can be split off with ease and because I didn't have to pay for it. I've serated one end with 3mm square serations that I use for applying thickened epoxy when laminating. I've also had great success using playing cards (look for the novelty giant sized ones) but haven't used them since I got this lump of plastic.

    Basically, you pour a dollop of epoxy at one end of the job, spread the living daylights out of it with the squeegee, roll it smooth with a foam roller and tip off with that same roller held in a non-rolling position with a finger (this breaks up all the little bubbles and allows the coat to self level). You get a really, really thin coating this way - barely a gloss coverage after 3 coats, nothing like the orange peel coatings I've seen photographed on here at times.

    For the frames, I'm using a cheap brush with the bristles cut to about 15mm long. Spread with the brush and it's stiff enough to tip off with the same brush.

    My kids like the Milo and Yogo chocolate deserts and I use these as mixing bowls because they're effectively free, take a three pump mix and can be tossed out after use.

    There's nothing unusual in any of that, it's as explained in a number of places on this forum (which is where I got the ideas from). The use of squeegee gives you an ultra thin coat and the roller makes it nice and even.

    I've got one of those rectangular, plastic pots you get take away chinese meals in. I put about 5mm of thinners in that. After I've done a coat, I toss the roller cover then place the squeegee, roller and brush in that, put the lot in a plastic bag and tie the end closed. Come time for the next coat, I take everything out, squeeze the thinners out of the brush and put everything, now nicely clean, out in the sun to dry while I mix up the next batch. By then, it's all ready to go again, even the brush. I don't do this with the roller covers because the thinners melts the plastic cores of the covers I'm using at the moment I don't care about being able to reuse the brush but while I'm able to get away with it, I'm happy.

    Richard

  15. #135
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    May 2003
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    South Oz, the big smokey bit in the middle
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    Coating the other side of the bulkheads today. Yes, the epoxy from yesterday is still green and a little soft and yes, it'll probably be marked where it's now sitting on the saw horses, but it's only a coating that'll be sanded smooth so I'm not fussed. Besides, they are predicting a wet and wild weekend, not good for coating things with epoxy.

    Same methods as before.

    Richard

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