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Thread: Building a Nutshell Pram - 9' 6"

  1. #106
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    Default Re: Building a Nutshell Pram - 9' 6"

    Sanded back the rub strip so the rail and the inside edge of the top sides are flush. I put the rub rail on a few millimeters below the strake so i could have something to sand off. some points where i needed a little filler to cover a crack, but by and large it was pretty good.

    Rubrail sanded.jpg

    Bit trickier where the transom, topsides and rub rail meet. How to sculpt that neatly is a puzzle. But I'm happy to leave it like this i think.
    I do like it a bit rough, it is clear it hasn't been popped out of a mold.

    Rub rail aft sanded.jpg

    got out my remaining blue gum for my seats. Realised i need 3 seats, not 2 - the mast needs something to drop into as well
    Will have to snoop around and see if i can get a bit of Blue gum the same colour ish.

    Stock for seats.jpg

    Got out the daggerboard sides.
    The plans don't have dimensions for these, except the fore and aft inside dimension. I went with 300mm x 300mm.
    My electric plane would only do a 9mm rabbet, for 10mm board. so i took a 1mm rabbet off the outside face of the board too.
    Fits nice.

    dagger board case one side.jpg dagger board case one side 2.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  2. #107
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    Default Re: Building a Nutshell Pram - 9' 6"

    I cut the stock for the dagger board truck logs, and milled it down to size before i cut the rabbet.
    i was hoping to do the rabbet on my jointer but it wouldn't go deep enough.
    I have a very limited table saw, its one of those Triton Mk2's or something. so droping the height of the blad is fraught.

    I screwed the log to a piece of scrap, and screwed that to the bench - and used my hand held electric plane.
    not fancy but it did the job.

    Rabetting the bed logs for dagger board case.jpg

    Glued up the seat stock. filling the groove using a syringe of resin.

    Syringe of resin.jpg

    here they are under the daggerboard case being glued up - prefilleting.

    dagger board case glue up sides.jpg

    dry fit of the dagger board - with extra long end posts. Instructions say 22" piece required - I failed to twig that they meant it should be cut in half.

    dagger board case dry assembly.jpg

    Glued and filleted up the daggerboard sides.
    Used Micro balloons here, they give a neater and smoother fillet.

    dagger board case fillets.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  3. #108
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    Default Re: Building a Nutshell Pram - 9' 6"

    Here's the worlds most intact mammoth that i brought into work the other day.
    Baby Lyuba was 30 days old when she fell into a pit of mud and was preserved for 42,000 years.

    Lyuba.jpg

    I can hijack my own tread can't I?
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  4. #109
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    Default Re: Building a Nutshell Pram - 9' 6"

    Quote Originally Posted by gypsie View Post
    Nice one Phil Y, i had a double take there for a minute - I though it was my boat

    I've planed all me edges back. i'll be beach launching quite a bit, and my boys will be thumping it about too - so I'm going to glass the outside i think.
    Plus, i didn't do a great job of my strake edges, so its a way of hiding that.

    Nice transom, what did you use?
    That centre laminated frame looks like hardwood - is it?
    Transoms and centre frame are PNG Rosewood.

  5. #110
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    Default Re: Building a Nutshell Pram - 9' 6"

    The mammoth is pretty cool. Try not to get any epoxy on it. Boat is coming along very nicely. We are doing rowing only version, so no centre case. Can always add that later if needs be.

  6. #111
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    Default Re: Building a Nutshell Pram - 9' 6"

    Using a plum line to get a position on the forward bench cleats.
    Center of bench is 27" from the forward face of the center frame.

    plum line bench cleats.jpg

    Bench cleats in position. screwed in from the outside. I'll keep the screws there after glueing, but i'll keep it all just screwed until everything is finished.

    bench cleats aft in place.jpg

    cut the aft and center benches.
    Aft required a 10 degree cut at the ends, the center bench is a little more than 2 degrees.
    I left the face plum, i figured a compound bevel here was unnecessarily complicated - and would only leave a thin feathered edge that could easily break.

    10 degree cut for aft bench.jpg 2 degree cut for center bench.jpg

    Center and Aft benches in place, with dagger board casing for reference.

    center and aft bech seats dry fit.jpg

    I miscalculated on my stock for the benches and transoms.
    I need a single piece of Blue Gum, 120cm long and 18cm wide - tongue and grooved to finish the forward bench so it is uniform. Its flooring timber.
    Hardware shops don't have it!!

    Wollongong area - any one know anyone?
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  7. #112
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    Default Re: Building a Nutshell Pram - 9' 6"

    I think you'll struggle to find flooring timber 180mm wide anywhere. You should get seasoned timber as blue gum does distort a fair bit as it dries out. Good timber retailers sell wider boards for beams etc. and they'd typically be happy to mill them down to your specifications. I don't know anyone in the Wollongong area but Anagote at Annandale would be able to supply and mill for you.

    Rick

  8. #113
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    Default Re: Building a Nutshell Pram - 9' 6"

    Looking good. Ours has stalled a bit. Written school project has been completed and submitted.

  9. #114
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    Default Re: Building a Nutshell Pram - 9' 6"

    Quote Originally Posted by RFNK View Post
    I think you'll struggle to find flooring timber 180mm wide anywhere. You should get seasoned timber as blue gum does distort a fair bit as it dries out. Good timber retailers sell wider boards for beams etc. and they'd typically be happy to mill them down to your specifications. I don't know anyone in the Wollongong area but Anagote at Annandale would be able to supply and mill for you.

    Rick
    Thanks Rick, I can check that out.
    Cheers
    T
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  10. #115
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    Default Re: Building a Nutshell Pram - 9' 6"

    She's a bit like a big scoop isn't she.
    I mean, when she goes over, she'll be pretty full.......

    It'd be a shame to strap inflated bags under the seats.....

    (just looking at Zuri's Shellback and those yummy built in buoyancy tanks)

    False floor with expanded foam.....
    Forward sealed compartment......

    Anyone have experience capsizing a nutshell when built without such modifications?
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  11. #116
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    Default Re: Building a Nutshell Pram - 9' 6"

    Bugger - it is not a matter of urgency.

    I was borrowing a tinny from a relative to get out to me boat.
    Some ****** ran into it and ripped the hull open. Man i am really pi$$ed off about it.

    IMG_4206.jpg

    now i am back to using the little rubber dinghy which really is on its last legs.
    So need to finish the Nutshell quickly.

    Had small conversation with my elder son about not having a sail boat, just finishing it as a tender.
    He nodded but i could see he was disappointed. So a sail boat it will remain.

    glued up the dagger board case.

    IMG_4205.jpg

    let it dry, buttered on some thickened epoxy on the forward and aft face and sanded down to smooth even surface.

    IMG_4235.jpg IMG_4234.jpg

    the top of the case here where the surface is no even will be cut down. the case as built is about 15cm too high.

    Drilled a hole in my boat!

    IMG_4229.jpg

    And made it bigger!!
    (next post)
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  12. #117
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    Default Re: Building a Nutshell Pram - 9' 6"

    Made it bigger take 2

    IMG_4230.jpg

    slotted in for testing, scribbed in the rocker and shaved it down.

    Hint - don't forget to mark which end is fore and aft......

    IMG_4231.jpg

    set the thwart in place as described in the manual and marked off the cutting line at the top of the case.
    ran it steadily through the bandsaw and went at it with the belt sander.
    radiused the edges with a 0.5cm radius cutter.

    Glued it down and put 6 screws into it from underneath.

    IMG_4248.jpg

    in my haste i glued a little piece on the forward side of the case to cover the slot. should have cut up a piece the same dimensions as the truck logs. but its okay.

    IMG_4247.jpg

    Notched in the thwart

    IMG_4245.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  13. #118
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    Default Re: Building a Nutshell Pram - 9' 6"

    Thwart fits in nicely

    IMG_4246.jpg

    cut out a piece for the mast step from a 2x4 piece of DF.
    began fitting it slowly and surely. many cuts, but all in the first piece of stock.

    IMG_4237.jpg

    pretty happy with the fit.
    Took its position from a pretend seat at that point. i don't have the stock for the forward seat yet, but i'll probably make up a temporary one from 19mm ply.
    backwards i know.

    IMG_4241.jpg

    emptied the boat, vacuumed it out.
    glued down the maststep - no screws.
    the whole boat got 2 layers of epoxy rolled on with a mohair roller.

    IMG_4258.jpg

    working quickly one rushes some things.
    one mistake i will live with for the life of this boat - i drilled the hole for the painter before i covered the boat in epoxy. just went at it with a 10mm bit.
    now its slightly to starboard.
    i will look at that for the coming years and grrrrr

    IMG_4259.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  14. #119
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    Default Re: Building a Nutshell Pram - 9' 6"

    Busy weekend, night night

    IMG_4243.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  15. #120
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    Default Re: Building a Nutshell Pram - 9' 6"

    Those thwarts look great. And of course the towing eye is just that little bit offset so that when towing her off your port quarter she will ride perfectly on the mother ships wake. Subtle, but perfect.

  16. #121
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    Default Re: Building a Nutshell Pram - 9' 6"

    Masked it up for painting the inside

    IMG_4269.jpg

    IMG_4270.jpg


    the masking did not work, it wouldn't stick to the epoxy on the transoms. i got much better results with a wet edge on a loaded brush.

    IMG_4273.jpg

    another couple of coats of white gloss on the inside.

    IMG_4282.jpg

    took her outside for flipping so i could work underneath.

    IMG_4288.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  17. #122
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    Default Re: Building a Nutshell Pram - 9' 6"

    for my missing piece of blue gum for the forward transom, i mocked up a temporary one with 19mm ply. I'll paint it white and use it as a template for when i do get my required timber.
    mocked in the mast with a piece of dowel.

    IMG_4284.jpg

    Pretty vertical

    IMG_4286.jpg

    Even if you can't tell. I've noticed the images don't rotate as per the phone camera. apologies if that's annoying.
    I thought that process of finding the right angle of rake and vertical laft right would be tricky. but i just trusted my eye and went for it.

    Got her flipped and stuck into underneath.

    IMG_4289.jpg

    IMG_4290.jpg

    gave her a coat of epoxy and tried the glass on for size.

    IMG_4302.jpg
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  18. #123
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    Default Re: Building a Nutshell Pram - 9' 6"

    Covered her in glass and glued it on.

    IMG_4303.jpg

    mulled over a design for the rudder. i want it to kick up. i think fighting a dagger board and a fixed rudder in a squall is too much, good to have one of them kick up and the rudder is the handier.

    IMG_4301.jpg

    cut out a couple of boards.
    the dagger board looks smaller than i expected (trust the drawing).
    the rudder is the same rough dimensions as the drawing, about 300 wide and 450 deep, but the drawing is a more finely shaped unit. my barn door will turn a dutch jacht.

    IMG_4298.jpg

    IMG_4299.jpg

    both these have been glassed on both sides.
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  19. #124
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    Default Re: Building a Nutshell Pram - 9' 6"

    Cut out the skeg.
    i didn't happen to have a 1" by 12" and 9ft long board of mahogany in the shed. hard as I tried to search around.
    so i did some calculations and worked out the width of the board, took it out of a 100mm wide, 20mm thick piece of quarter sawn Douglas Fir. And sprung it into place.

    IMG_4308.jpg

    those figures, the 111 and 79mm and so on - are the widths of the board.
    the figures under them (which i ignored) are the distances from datum, the bottom of the board. If you're confident and you have the stock you can use these to fit a beautifully matching keel. but look at the waste - mahogany must have been cheap and easy to get at some point in the history of man.
    I didn't use those and simply sprung the keel on. hopefully it won't rip off the boat when i release my various clamping devices.

    IMG_4305.jpg

    IMG_4304.jpg

    the bottom, the rudder and dagger board will get another coat of epoxy tonight and i'll start painting tomorrow morning.
    I'll have her on the water on thursday as a tender - without spars/sails/dagger board etc.. We're planning to spend the week out on Jervis Bay hanging out and need a tender now that our tinny has been totalled.
    Then i'll bring her back and finish her off - though there isn't much left to go.
    must oil the thwarts...!
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  20. #125
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    Default Re: Building a Nutshell Pram - 9' 6"

    Oh wow! Nearly there, fantastic.

  21. #126
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    Default Re: Building a Nutshell Pram - 9' 6"

    I like the Spanish windlass!

  22. #127
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    Default Re: Building a Nutshell Pram - 9' 6"

    yes - head down bum up and ran out of long clamps.

    I need the tender for Thursday (Tuesday today). I got a second coat of epoxy on the outside glass last night but the weave is still very present.
    I'm thinking i might leave her unpainted on the outside until i get it back in the shed in 2 weeks time. Give me a chance to sand and fill that weave before painting the outside.

    Sanding epoxied glass - that bloody dust is so irritating. My eyes are still itchy the following day.
    “Ignorance more frequently begets confidence than does knowledge” - Charles Darwin (1809–1882)

    Nutshell Pram Build pictures ; https://photos.app.goo.gl/1GdBcckcgBAWsbVg1

  23. #128
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    Default Re: Building a Nutshell Pram - 9' 6"

    Nice work, enjoy the launch.

  24. #129
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    Default Re: Building a Nutshell Pram - 9' 6"

    Can't borrow something for Thursday, or crack out the inflatable? Pity to rush the last stages. Either way, good luck. And watch that fresh epoxy dust, apparently it's pretty nasty stuff. Not quite as bad once it's gone off properly, I believe. Still itchy but less dangerous.

  25. #130
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    Default Re: Building a Nutshell Pram - 9' 6"

    Yes but still a bugger to sand. The best way is to use an epoxy high build primer. I use Jotun Penguard. You put it straight on the curing epoxy and use the chemical bond. Leave it for a day or ten and it sands very easily. Then finish coat. I've only tried one other epoxy primer and it's awful but I'm sure there are other good ones.

    Rick

  26. #131
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    Default Re: Building a Nutshell Pram - 9' 6"

    Don't sand if there is a good chance you will be sanding the fabric. Put on enough epoxy to fill the weave, then sand to get the desired smoothness but not sand into the glass.

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