A simple, quick and elegant ply canoe

[Gavin Atkin]

This little 140 by 30in by 300lbs displacement open canoe is a recent design project - I think it's will offer a lot of boatbuilding fun, and will be elegant when finished.

The plans are free if you're building in small numbers for your own purposes. I'd be delighted to see two or three built, but if anyone out there is planning on more than that many, please contact me at gmatin @ clara.net .

http://home.clara.net/gmatkin/cinderella1.0.zip

Gavin

[JimD]

Sweet looking design, Gavin. If I come across anyone looking for canoe plans I'll point them to her.

[Gavin Atkin]

Thanks fella!

Gavin

[NormMessinger]

Somebody! ANYBODY!! Stop me before I build again.

Granddaughter is a bit jealous. I've build a canoe with all the grandneighbors so she wants to build one with me. She'd have to spend the whole summer here to do this one but it looks like a dandy.

[Gavin Atkin]

Never - this is a two-weekend job. Anyway, you clealy NEED to build...

Make the butt joint on Thursday or Wednesday evening so that it's reasonably well set for Friday night. Friday night and Saturday morning mark out, Saturday afternoon saw, break out the duct tape and stitch only those parts that won't hold together with the tape. Saturday evening do the internal taping.

Remember - this is very soft chines stitch and glue, not lapstrake, so there are no lands to trim.

Sunday, flip it over and tape of glasscloth the outside. Next weekend, sand her, add the gunwale and inwale, and carrier. The rest is painting, which takes as long or as little as you want.

Gavin

[NormMessinger]

One guy could build on your time scale, a guy and a kid on mine. smile.gif

3/8" seems awefully heavy for a boat this size. The .dwg file came into TurboCAD just fine. Now to figure out your XY coordinates.

[Gavin Atkin]

3/4 would be heavy. 3/8ths will be fine - I haven't made this boat, but have made boats very like it.

Actually, I'd be quite keen on giving the bottom a little extra glass...

If you find anything wrong with the coordinates, please let me know.

Gavin

[Gavin Atkin]

Folks -

I should explain that you don't need CAD to make sense of this design. There's a pdf file, and a gif file as well as a dxf and dwg.

Gavin

[Wild Dingo]

Shes a little ripper Gavin... well done and thanks!

Norm mate... YOU DO NEED TO BUILD THIS ONE!!! :cool: yes you do you know you do mate theres no backin out of it mate just get ye out to the boatshop and gerrinnait!! ;)

[Gavin Atkin]

Norm's quite right. I MEANT 3/16ths. I just wrote 3/8ths and couldn't see the mistake for looking...

Gavin

[PaulC]

She is a pretty boat Gav. She might be just the cure for the Fiddlehead I have been contemplating.

[NormMessinger]

Originally posted by Gavin Atkin:
Norm's quite right. I MEANT 3/16ths. I just wrote 3/8ths and couldn't see the mistake for looking...

GavinWhew! I was thinking 1/4" would be a bit heavy but decided not to argue with the designer. smile.gif

[Gavin Atkin]

Cinderella /is/ pretty - but do please bear in mind that she's NOT a lapstrake canoe but a many-chined canoe with a small-ish flat bottom.

There's nothing wrong with that - but I do think it's important to be clear on the matter.

One could take the CAD drawings and work up a lapstrake version to be built on a strongback. Apart from the hard work, the issues would be

- the first strake up from the bottom, which would have to be executed in s&g because of the acute angle - though the rest could be lapped, right enough

- Cinderella has no hollows, and so does not take special advantage of strongback construction

Gavin

[Cuyahoga Chuck]

Gavin,
A lovely boat and one that I would consider building but not with 9mm ply. A canoe of this size should weigh no more than 50 lb. and I don't think your design could get close to that. The multi-planked hull will require a lot of glass/epoxy that will drive weight up quickly.
There are many S&G 40+ mph powerboats that get by with 6mm and a layer of biax cloth. For the limited stress of a canoe I would think that 4mm with 6 oz. cloth should be sufficient and would crowd the 50 lb. mark.
I paddle a 14 ft.,45 lb., 3-panel pirogue that is made from run-of-the-mill 6mm underlayment which can suffer blows from submerged objects without complaint. It has no internal structure yet the wales and the carrying yoke keep it stiff as a cob. It even survived a flight thru' the air when it tore loose from my car and landed in the highway.
Your design is the first I've encountered that specified so heavy a plywood. If there is some aspect of your design that I don't comprehend please enlighten me.
Charlie

[NormMessinger]

Chuck, you missed Gavin's correction above. He says he ment to say 3/16" plywood. Sound about right to me.

[ausie]

Gavin,
I agree she should look sweet.

I have been looking at Oughtreds Wee Rob & the lovely similar canoes at Duck Trap.I have books on how to do lap-strake/glued clinker from both of these sources & mind you, these are superb publications that really present the reader with the best teaching texts that I have found in all my searching.

But your little canoe shows considerable promise.I have built,among other boats,Bateau.coms "cheap canoe" which is easy to make,stable & performs well.In fact,I have converted it to a "proa" & am about to put a used sailboard sail on it.Steering will be by an oar.I will try to put a picture on this forum,& will send you one separately as well,as I often foul up sending things to web-sites.

What I set out to ask was why have you not designed rocker into this hull?Is it to increase initial stability,or help with directional stability?...or just to keep it simple?I am going to build one,(being an addict),& intend to use 4mm cedar marine ply to BS1088 AA-A bond which is about the same weight as Gaboon at 8-10 kg/2400x1200 sheet.All those chines filleted & taped with epoxy will make it very stiff,so thin ply will be ok....Iain Oughtred suggests 3-4mm for WeeRob to achieve a boat around 9-10kg...that's light as the Batteau CC14 came out at 26kg using 6mm hoop pine ply....I did add heavy skegs for tracking & hull protection & thick gunwales,so getting down to around 10kg will be a challenge,& a welcome one as my wife wanted a 2-man 16'-17' canoe,but I figue 2x12' lightweight boats would be better.

I will post pictures ....just remembered,Scott(is it) from WoodenBoat H/O said the facility for posting photos is "broken' at the moment,so maybe when it is fixed.

Al Burke.

[Gavin Atkin]

Gavin,
I agree she should look sweet... [big snip] What I set out to ask was why have you not designed rocker into this hull?Is it to increase initial stability,or help with directional stability?...or just to keep it simple?I am going to build one,(being an addict),& intend to use 4mm cedar marine ply to BS1088 AA-A bond which is about the same weight as Gaboon at 8-10 kg/2400x1200 sheet.All those chines filleted & taped with epoxy will make it very stiff,so thin ply will be ok....[snip again] I will post pictures ....This is great news Al - I'm delighted to hear it. There's no rocker to aid tracking and to make life simple - keep the bottom straight and use a couple of sticks (or even a removable frame) to prevent the sides falling in, and you should get the intended shape. It will be stiff, and shapely too. And I'm very much looking forward to the pictures.

This will be the first boat built to this design, so please keep in close touch with me as you build. You can reach me directly at gmatkin@clara.net .

Many thanks for having a go at this boat - I'm sure it has the potential to be a real winner.

Gavin

[JimConlin]

Cedar ply?
Anybody know of a US supplier?

[WX]

Please excuse me if this is a stupid question, but how do I use the xy co-ords to set out the component outlines on the ply?

[PaulC]

WX,
Laying out the coordinates is easy... it's just making a graph, like in math class.

Turn the plywood so that the 8 foot side is the X-axis and the 4' side is the Y-axis. Mark out the points and connect the dots! Grab your sabre saw and voila!

[WX]

Thank you PaulC, much appreciated. I've built a few Bolger designs so I should be able to grasp the concept :)

[Paulyboy]

Tried to download the zip file, but can't unzip it. Any ideas?

[Rick Clark]

http://home.clara.net/gmatkin/cinderella1.0.zip

Gavin I found that this link is broken, sorry
Rick :confused:

[Paulyboy]

Had the link working this summer, but I guess now that a few are built, the link is no longer active. What a shame, the boat looked sweet!

[PVanderwaart]

The link may be gone, but the boat survives!

http://www.duckworksbbs.com/plans/gavin/cinderella/index.htm

[ausie]

Rick,

I have a print-out of Cinderella which I can scan & email you if you like....don't know how clear it will be though.Failing that,I could post you a copy.

Maybe Gavin will re-activate the link.

I am about to build one.

Al Burke.

[ausie]

Good on yer,PV!

Good ol' Duckworks.

Your jake now Rick.

Al