Started on the N7

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LBrewer
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Started on the N7

Post by LBrewer »

I started the nutshell dinghy today. I'm using 5.2 mm imported hardwood (whatever that means) exterior ply from the big box. It doesn't look too bad. The 3/8" exterior ply they had was lousy.....i mean really lousy. I'll laminate a double thickness of the 5.2 for the transom.
For the frames, I thought I'd try gluing up CCA treated pine fenceboards to the correct dimensions. They are 1/2" thick rough cut. By the time I plane and sand them smooth they should be close to 3/8". The layout is shown in the following diagram:

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Anyone ever tried this? Is this OK structurally :?:

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BilltheCat
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Post by BilltheCat »

I too built the N7 from 5.2 stuff, but for the frames, I laminated a sheet of 1/8 luan to get the 3/8ths. It is the yellow one on Jacques N7 photos.

The pine may not remain stable - that is warp - but the stress on these parts in this small boat is less that on the larger and or planning boats, so the call is yours. However the CCA fence board I've seen is awfully pretty once planned - nice grain and color.

I glassed the bottom to about 3" up the side with 3.55 ounce satin glass (an ebay experiment) that has held up very well. Love the satin glass - less fairing. I also glassed the sole and created a minimal composite panel effect. I glassed the transom outside with two layers of 8 ounce - cause I could and it was at hand, then finished it bright.

LBrewer
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Post by LBrewer »

Yes....you're the culprit! The yellow dinghy is the one that my wife and the 3rd grade teacher said was cute! Now I have to build one. :) LOL excellent work.

I had some of these fence boards left over from Hurricane Ivan (been using them to board up windows the last couple of hurricane seasons, its easier to handle them on the ladder than plywood). I am hoping that the ones that are prone to warp have already done so, and the moisture content should be somewhat stable by now since they are only 1/2" thick. I oriented the pieces with the grain in different directions to minimize expansion/contraction issues.

I used the boards for the thwarts on my canoes. Thats what gave me the idea. I had intended to paint them, but after planing and sanding them smooth, they looked so nice I left them bright.

Larry

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BilltheCat
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Post by BilltheCat »

Then I think your good to go ..... the pine (laminate two layers) will be perfect for the skeg - I used some cypress I had around.

AND .... any day I can influence the building of the boat, is a good day.

Dave

LBrewer
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Post by LBrewer »

Slowed down a bit waiting for the epoxy to set on the laminated frames on Saturday. Thats ok though.....I got to go to the Wooden boat show at the Grand Mariner Marina. When I got home I did get a little accomplished. I had to work today, but still managed a little more. Below are Saturday's progress pics. It got dark on me tonite before I got any pictures. I'll post some more tomorrow.

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LBrewer
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Post by LBrewer »

Well, it got dark on me again.......whose idea was it that we have to go to work to eat and pay bills :(
I got a little more done and took a picture anyway :)

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Lackofdistinction
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Post by Lackofdistinction »

Easy Parts Done.
One little tip be very careful about aligning the boat and making sure it is square.

It will really show if you don't toward the end of your build. :wink:

P.s. I can tell you that from experience.
"Off Fighting Windmills."

LBrewer
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Post by LBrewer »

In one of the pics above I show a diagonal brace running from one corner of the midseat frame to the opposite corner of the transom. After measuring the diagonals and adjusting to get them identical, I fastened the brace with temporary staples. I kept that brace in place until the fillets cured fastening the frames to the side panels and bottom. After curing, I held my breath and measured all diagonals again........whew!.....it didn't slip! :)

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Lackofdistinction
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Post by Lackofdistinction »

8)
Your S&G is very Strong Grasshopper! :D

http://gallery.bateau2.comdisplayimage.php?pos=-6924

Then I think your good to go ..... the pine (laminate two layers) will be perfect for the skeg - I used some cypress I had around.




I laminated 3 peices of ply together on one of the boats and on the other I cut The Skeg out of a piece of Yellow Pine 2x10.
"Off Fighting Windmills."

LBrewer
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Post by LBrewer »

Wow.....fitting the seats can be kinda time consuming :| There's bound to be some trick that I haven't discovered yet!

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