22nd Aug 2009, 07:03 PM #121
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
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22nd Aug 2009, 07:04 PM #122
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
23rd Aug 2009, 01:46 AM #123
You must be pleased with the progress so far - I think you are doing great.
23rd Aug 2009, 02:24 AM #124
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.
23rd Aug 2009, 01:41 PM #125
Thanks for that post Bob - you've answered a question for me.
24th Aug 2009, 03:18 AM #126
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.
24th Aug 2009, 11:34 AM #127
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!
24th Aug 2009, 07:38 PM #128Member
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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
26th Aug 2009, 02:03 AM #129
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.
26th Aug 2009, 02:54 AM #130Intermediate Member
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- São Paulo, Brazil
Now someone will tell me that this approach has been in use in Australia for the last 50 years - but, oh well!
26th Aug 2009, 04:34 PM #131
"..................this approach has been in use in Australia for the last 50 years"
27th Aug 2009, 08:05 PM #132
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
27th Aug 2009, 09:03 PM #133
For my further education, Richard, what aplicator are you using?
27th Aug 2009, 10:52 PM #134
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.
28th Aug 2009, 03:04 PM #135
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.
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