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Thread: The believed abstraction of a 12 foot clinker dinghy.

  1. #316
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    And most beautifull.

  2. #317
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Even your fibreglassing is impressive. Nice work Mike.

  3. #318
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Cheers Ian, Max and Wayne.

    Next task was to put a boot onto the foot of the board.

    IMG-4300.jpg

    The existing fiberglass was sanded to a taper at the bottom to receive the carbon fibre cloth.
    The area around the boot was taped off allowing for about a 1/2 inch lap, also I wanted to cut the carbon along the taped line.
    The Kauri foot also had a slight taper toward the end to help with the scarfing of the two cloths.

    IMG-4303.jpg

    The foot was primed with epoxy and the pre soaked carbon was laid around the foot.
    Using a pattern as a cutting guide the carbon was trimmed to the taped line when in a green state.

    IMG-4305.jpg

    A 50/50 mix of 410 and epoxy was applied while the existing resin was still tacky.
    The filler was spread beyond the edge. This would be a sanding guide to gauge the amount of removal.
    I also drew a pencil line beyond the top edge of the carbon before filling to also act as a guide, knowing when that disappeared I was cutting into the existing layer.

    IMG-4307.jpg

    This was the result. The two cloths are now scarfed together.

    IMG-4314.jpg

    A final wet test to check out the finish.
    As mentioned before the whole lot will receive another coat of epoxy and I'm just about to order the graphite powder.

    Some of my methods of construction may seem a little unorthodox...or not... to some and as I have mentioned in past posts, there is more than one way to do a job.
    I have added a few extras to this board compared to the original in the DuckWorks link.
    The rudder I expect to complete in half the time now that I have a system in place.
    Last edited by Mike1902; 03-10-2021 at 04:30 PM.

  4. #319
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Again that was a perfect fit with my morning coffe dude.
    Using a pattern as a cutting guide was a smart move.
    I´ll remember that for my own use.
    Greate crack mate.
    Cheers Max

  5. #320
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Cheers Max.

    The ordered graphite powder has yet to arrive but, as luck would have it I came across a 35 gram container of lock and key graphite powder when having a clean up.
    Amazing what you find when having a clean up.

    IMG-4335.jpg

    I taped the board along the edges to let any resin drip off and create a clean line.
    A blended 10% graphite to epoxy by volume mix was applied using a squeegee and then a brush.
    I will probably apply two coats to both sides to build up the graphite and then wet sand the surface.

  6. #321
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Wonderful, well-executed work! Carry on...
    But, I need to know, what is this "clean up" of which you speak?
    BQ

  7. #322
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Boatsbgood View Post
    Wonderful, well-executed work! Carry on...
    But, I need to know, what is this "clean up" of which you speak?
    BQ
    Cheers mate.

    "Clean up"... something that needs to happen on a more regular basis.

  8. #323
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Applied a second coat which adds to the graphite thickness and evens out the colour.

    IMG-4343.jpg

    Now ready for a fine sanded finish.

  9. #324
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    My idea is to shape the dagger board case to match the foil profile.
    To do this means curving the sides of the case.
    So I made up a couple of 2 mm thick by 50 mm wide strips from Kauri to test how they would form.

    IMG-4345.jpg

    Using the board as a form, battens were shaped either side to match the angle off the board.
    The Kauri strips were then laminated together with PVA and screwed down each side into the battens.

    IMG-4360.jpg

    A couple of hours later I removed the screws to gauge the spring back and was pleasantly surprised to find not much at all.
    I will now make up two panels about 450 mm wide by 2 mm thick. These will be laminated together in the manner shown above, strip edges staggered.
    These will form the case sides, vertical staves will be glued to the outside of the case to match the bulkhead detail.
    All of this will be encased in a foil shaped supporting frame... yet to be figured out, but I have a few ideas.

  10. #325
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Oh man, what a nice idea. This will be a blast!
    I really really like your ideas.
    Cheers
    Max

  11. #326
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Max F View Post
    Oh man, what a nice idea. This will be a blast!
    I really really like your ideas.
    Cheers
    Max
    Thanks Max.

    Time will tell whether they are good ideas or not. The process is enjoyable and makes for an interesting exercise.
    'Nothing ventured, nothing gained".

    Cheers,
    Mike.

  12. #327
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Finished the dagger board today off with a 240 grit sanding.
    May go a little finer later on but this is enough for now.

    IMG-4367.jpgIMG-4374 (1).jpg

    The board weighs 4.8 kilograms ( 10.5 lbs).
    A wooden cap with shaped rebates for a hand grip will be fitted to the head of the board.
    The idea I have for this is to have it finishing flush with a removable thwart that will be incorporated into the dagger board case design.

  13. #328
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    "My idea is to shape the dagger board case to match the foil profile."

    I thought for a moment that you were going to put foils on it!

    Ian
    Last edited by IanMilne; 03-18-2021 at 06:01 AM. Reason: format
    Old Joke: ‘A bench fitter works to the nearest thousandth of an inch. A loco fitter (steam) works to the nearest inch. A shipwright works to the nearest ship’.”
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    “...old maxim, 'A fair line supersedes any given measurement'.”
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  14. #329
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Mike1902 View Post
    Finished the dagger board today off with a 240 grit sanding.
    May go a little finer later on but this is enough for now.

    IMG-4367.jpgIMG-4374 (1).jpg

    The board weighs 4.8 kilograms ( 10.5 lbs).
    A wooden cap with shaped rebates for a hand grip will be fitted to the head of the board.
    The idea I have for this is to have it finishing flush with a removable thwart that will be incorporated into the dagger board case design.
    You'll be fitting something pretty good to hold it down, the boat will want to try to invert with that beauty down and no one in it.

  15. #330
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by IanMilne View Post
    "My idea is to shape the dagger board case to match the foil profile."

    I thought for a moment that you were going to put foils on it!

    Ian
    Yeah...Hmmm...I also thought for a moment about foils...but my mind has been known to play tricks on me.

    Plus being a Kiwi at this point in time, it's hard not to get caught up in the winners are grinners ways.

  16. #331
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by John B View Post
    You'll be fitting something pretty good to hold it down, the boat will want to try to invert with that beauty down and no one in it.
    It's all part of my cunning plan. If in the unlikely but possible event of my falling OB while solo, the dinghy will tip over thereby allowing me to catch up... unless of course the wind catches that beamy hull and it drifts away faster than I can swim.

    Dammit... more thinking needs to go into the cunning plan.
    Last edited by Mike1902; 03-18-2021 at 04:53 PM.

  17. #332
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Milled up a bit of Kauri today to make the sides of the dagger board case.
    I used an offcut from the bench top that I made the stern sheets from and the remainder of an old mantelpiece, hence a few nail and screw holes (which will not be seen when finished).
    Apart from the ply, all the timber that has been and will be used on this dinghy is recycled.

    IMG-4381.jpg

    Needed 40 lengths at 2 mm x 46mm x 450mm. This would give me four panels 2 x 460 x 450.

    IMG-4383.jpgIMG-4390.jpg

    The strips were edge glued with an industrial grade polyaliphatic cross linking PVA.
    Each one could be made, then removed from the clamps in twenty minutes.

    IMG-4389.jpg

    Two of the panels were made with half width strips along each side, so when it's laminated to one of the other panels, the glue lines will be staggered.
    In the photo above I have been using a block with 60 grit paper ( from a broken sanding belt) attached, to sand across the grain.
    This removes any glue and roughens up the surface, ready for the laminating epoxy.

  18. #333
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    That´s all you got so far?
    Man I´m used to more by now...
    Gone lazy?
    hahahahahaha

  19. #334
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    The strips were edge glued with an industrial grade polyaliphatic cross linking PVA.
    Each one could be made, then removed from the clamps in twenty minutes.
    What’s the glue Mike?
    Larks

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  20. #335
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Max F View Post
    That´s all you got so far?
    Man I´m used to more by now...
    Gone lazy?
    hahahahahaha
    Yeah Max, to much thinking, not enough hands on.
    Though the sketch pad has had a good workout.
    I'm figuring out the construction method and proportions for the bedlogs and support framing for the dagger board case.

    Quote Originally Posted by Larks View Post
    What’s the glue Mike?
    Gidday Larks,
    It is Selleys Aquadhere.
    Not for permanently submersed applications of course.
    In this instance the timber panels will be laminated with epoxy and will be encased in fiberglass/epoxy as well.

    Cheers,
    Mike.

  21. #336
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Glued up the first panels using the dagger board as a form.
    Had a dry run before permanent fixture.

    IMG-4392.jpgIMG-4393.jpg

    The panels were pulled down evenly along the tail end but held loosely to allow movement when the middle sections were pressed onto the board profile.

    IMG-4395.jpg

    A few battens and wedges took care of that, then the trailing edge was secured.

    IMG-4396.jpgIMG-4397.jpg

    The over flexing and fixing of the panels along the leading edge allowed for a little spring back, making for a more accurate fit.
    One down, one to go.

  22. #337
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Very nice.
    With only two layers, the panel is holding it shape well.
    I´m curious how you will proceed. But please don´t tell.
    Cheers Max

  23. #338
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Max F View Post
    Very nice.
    With only two layers, the panel is holding it shape well.
    I´m curious how you will proceed. But please don´t tell.
    Cheers Max
    Hi Max.
    I'm going to have to tell now Max, as I have a few more photos
    The panels are only there to keep the water out really.
    They will offer some stiffness when glassed but the main loads will be taken up by the bedlogs, support framing and a thwart.
    Photos tomorrow.
    Cheers,
    Mike.
    Last edited by Mike1902; 03-25-2021 at 04:05 AM.

  24. #339
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    After rummaging through my Kauri offcut bin I found these rather tack ridden pieces that were suitably long and thick enough for the purpose of making the dagger board case bedlogs and support frame.

    IMG-4399.jpgIMG-4401.jpg

    After a rather lengthy de nailing session I milled up four pieces 600mm (23.5")L,130mm (5")W by 30 mm(1-3/16") thick, managing to mill out most of the nail holes along one side.
    Placed in pairs, they were then laminated together doubling the thickness.
    The profile of the dagger board was then drawn onto the surface plus the panel profiles.

    IMG-4416.jpgIMG-4429.jpg

    A panel profile jig was made and the required material removed.
    The four edges of the panels will finish against rebates in frame so the edges are not at risk of moisture exposure.
    The timber rebates were trimmed flush at the top and bottom.

    IMG-4422.jpg

    There is a gap of 2.5 mm (3/32") all round the board. This is to allow for the glassing of the panel surfaces plus clearance.
    Last edited by Mike1902; 03-25-2021 at 06:26 PM.

  25. #340
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    After checking the board clearances the panels were removed and the bedlogs and top frame were shaped up.

    IMG-4430.jpgIMG-4431.jpg

    These photos were taken immediately after the initial shaping to get an idea of proportion.
    It's looking a little top heavy, so I will probably reduce the thickness of the top ring frame by about a third.
    The bed logs will be mostly hidden by the cockpit sole boards.
    The perimeter edges will be rounded off to soften the look also.
    Next task is to make the vertical framing pieces for the forward and aft ends.

  26. #341
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Amazing work as usual Mike - very inspiring!! Anyone would think that you’ve done this before.......
    Larks

    “It’s impossible”, said pride.
    “It’s risky”, said experience.
    “It’s pointless”, said reason.
    “Give it a try”, whispered the heart.

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  27. #342
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Mike
    Your project, and standard of work, make me smile...
    Thank you
    Brian

  28. #343
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    You made my day mate!

  29. #344
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by Boatsbgood View Post
    Mike
    Your project, and standard of work, make me smile...
    Thank you
    Brian
    Quote Originally Posted by Max F View Post
    You made my day mate!
    Quote Originally Posted by Larks View Post
    Amazing work as usual Mike - very inspiring!! Anyone would think that you’ve done this before.......
    Thanks gentlemen.
    To know that this thread, in some small way, can inspire, bring a smile and make a day is encouraging.
    Thanks again,
    Cheers,
    Mike.

  30. #345
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Nora!

  31. #346
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Quote Originally Posted by John B View Post
    Nora!
    I knew a Nora many years ago. She was a chef on Block Island. Made the best hot chicken rolls. It was the gravy mate, the gravy.

  32. #347
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    I started today in the workshop reshaping that top ring frame, then decided I should make up the end caps before getting too carried away and risk ruining the proportions.

    IMG-4438.jpgIMG-4450 (1).jpg

    Firstly the rebates were cut into the rectangular stock to match that of the frames fore and aft.
    This was completed mostly on the table saw but the forward cap had the scallop cut on the router table.
    The convex shape was drawn on both ends of the stock and then shaped up with a block plane and finished on the horizontal belt sander.

    IMG-4443.jpgIMG-4449.jpg

    The half caps were fitted onto the panels with small screws into the rebates.
    A spline will run vertically down the length of the end cap and part way into the top and bottom frame. This will help align the two adjoining surfaces and make for a stronger connection

    IMG-4446.jpg

    The top ring frame is still a work in progress. The original idea was to have a thwart sitting on the top, that idea has now gone out the window mainly due to the fact that it would sit to high in the boat.
    I will now curve the top face and shape a dagger board cap with a handle to fit.

  33. #348
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Wow Mike.
    This gets better and better. Your work is very inspirational.
    I don´t think i ever have seen a more sexy c-boardcase.
    Keep on rockin
    Max

  34. #349
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    Cheers Max.

    Made up some new forward end cappings today because the first ones didn't look right.

    IMG-4451.jpg

    The new ones are in the middle, the first ones are on the left.
    As can be seen, the return face on the left set is to narrow, while the new ones match the aft set. The shape fits in better with the bedlog profile as well.

    IMG-4456.jpg IMG-4458.jpg

    Routered in the channels for the splines today as well. The vertical and horizontal splines help lock it all together.
    This will help strengthen the joins and align the halves accurately when gluing up.

  35. #350
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    Default Re: The believed abstraction of a 12 foot clinker dinghy.

    So, the top ring frame has had 10 mm removed all the way around the sides. To my eye it looked a little bulky, so some of the volume needed to go.
    A line was scribed around the edge and the material was removed on the band saw.

    IMG-4461.jpg

    The two halves were held together as shown, to assure they would be symmetrical when sanded to remove the saw marks.

    IMG-4462.jpg

    The radius along the bottom edge was completed on the router table.
    The radius around the top was created using a block plane, chisel and sandpaper.

    IMG-4463.jpgIMG-4464.jpg

    The angle of these photos don't really do it justice and still tend to make the top look... well a little top heavy... but it's definitely an improvement.

    IMG-4469.jpg

    Sat the case in the boat, which made it look smaller.
    Staves, the same as seen on the forward bulkhead will line between the frames of the case.
    The staves will be clear finished and the frame will be painted off white.
    Last edited by Mike1902; 03-28-2021 at 06:29 PM.

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