I would worry a bit about that wide, flattish bottom. With traditional light bent frames, it would be a week point. Maybe with Dave Gentry's system of plywood bulkheads and fewer, heavier stringers it would be OK? With some lighter intermediate stringers to keep the fabric from going deeply concave between heavier stringers.
skin on frame sailboat?
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Re: skin on frame sailboat?
I would worry a bit about that wide, flattish bottom. With traditional light bent frames, it would be a week point. Maybe with Dave Gentry's system of plywood bulkheads and fewer, heavier stringers it would be OK? With some lighter intermediate stringers to keep the fabric from going deeply concave between heavier stringers.
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Re: skin on frame sailboat?
I would worry a bit about that wide, flattish bottom. With traditional light bent frames, it would be a week point. Maybe with Dave Gentry's system of plywood bulkheads and fewer, heavier stringers it would be OK? With some lighter intermediate stringers to keep the fabric from going deeply concave between heavier stringers.On the trailing edge of technology.
https://www.amazon.com/Outlaw-John-L.../dp/B07LC6Y934
http://www.scribd.com/johnmwatkins/documents
http://booksellersvsbestsellers.blogspot.com/Comment
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Re: skin on frame sailboat?
I've had two thoughts.
Historically, think St Brendan's currach, there was as much wood in a sof boat as in an Old Town canoe.
Then I thought may be geodesics might be strong enough. You probably would need to build over a form.It really is quite difficult to build an ugly wooden boat.
The power of the web: Anyone can post anything on the web
The weakness of the web: Anyone can post anything on the web.Comment
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Re: skin on frame sailboat?
On the trailing edge of technology.
https://www.amazon.com/Outlaw-John-L.../dp/B07LC6Y934
http://www.scribd.com/johnmwatkins/documents
http://booksellersvsbestsellers.blogspot.com/Comment
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Re: skin on frame sailboat?
Montfort did a hybrid with a ply bottom and skin on frame sides - blivit 13
As all skin on frame boats need bottom boards to stand in this seemed like a good idea. People have also done pram dinghies this way by when I did a CAD model the weight savings for SOF was negligible. It was a lot of light ribs type construction and only small. I am sure there is a law of diminishing returns with as SOF gets smaller
I think a larger boat with a Dave Gentry type frame and about half the bottom made of ply would be worth looking at, the ply part would make a good planning surface.
johnw what are you look for a primary requirement of this craft- lightness for car topping, or performance? One or two up?Last edited by Chris249; 06-03-2018, 06:19 PM.Comment
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It really is quite difficult to build an ugly wooden boat.
The power of the web: Anyone can post anything on the web
The weakness of the web: Anyone can post anything on the web.Comment
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Re: skin on frame sailboat?
Blivit is full on planing machine. I'm not sure about her longevity, shrouds and board support, however I do know the daggerboard trunk is pretty stout after testing it on a sandbar when I had it planing.Ben Fuller
Ran Tan, Liten Kuhling, Tipsy, Tippy, Josef W., Merry Mouth, Imp, Macavity, Look Far, Flash and a quiver of other 'yaks.
"Bound fast is boatless man."Comment
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Re: skin on frame sailboat?
Well, that's a pretty good recommendation. 200 hours, though, those geodesic boats take a lot of labor.On the trailing edge of technology.
https://www.amazon.com/Outlaw-John-L.../dp/B07LC6Y934
http://www.scribd.com/johnmwatkins/documents
http://booksellersvsbestsellers.blogspot.com/Comment
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Re: skin on frame sailboat?
You cant expect to get the ideal boat for your needs if you are not willing to invest the time to build it. Is there a reason you have not bought a second hand Laser?Comment
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I'm thinking making it light will help make it fast, and I'm thinking one up, with enough potential displacement to carry two. A roomy cockpit is a plus for this reason. I'd like to make it self-rescuing.
The more I look at the Gentry design, the better I like it. Only the stern does worry me, the Chapelle lines show a boat built around an almost full-length, rather wide straight keel, which means the stern is fairly veed and the run is short and steep. Dave, I can't really tell from the picture, is that true of your design? If so, it's better for rowing than the kind of boat I have in mind, but has a lower top speed that I'd hoped for.
The Blivit looks awesome, by the way, is it self-rescuing?
One of my hot contenders has always been a tacking outrigger.
Stick with me, there is some logic to this.
The main hull, vaka:
>Simple quick construction of ply with chine logs
> Long and thin, fast, light and easy to get on a rack,
> Simple enclosed buoyancy will be minimum width and depth, again helps with racking and also storage
> Depending upon design lateral resistance can be provided by the vaka.
I can hear you saying that’s all good but then I need beams (aka) and floats (ama), which is very true but these are relatively small, light and with correct design simple to make. They could be designed to fit inside you car.
I have always admired flaquita
kit,wood,boats,sailboats,multihull,hobie,cat,construction,home-built,homebuilt,cartop,outrigger,sailing,canoe,epoxy,proa,for sale,nice,beautiful,excellent,do it yourself,hobby,carpenter
And Arara
But you can go SOF
You could even go hybrid, SOF above the waterline.
Anyway just a thought but you could get a good speed, still roof rack and a simple and quick build
What I get up to
https://youtu.be/X9NZEyvpb_Y Streaker dinghy
https://youtu.be/oni-3rJzxqQ Sail Canoe
https://youtu.be/eW078PPgJak ProaComment
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Very much work in progress
14ft vaka,
40lb easy probably 30lb
What I get up to
https://youtu.be/X9NZEyvpb_Y Streaker dinghy
https://youtu.be/oni-3rJzxqQ Sail Canoe
https://youtu.be/eW078PPgJak ProaComment
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Re: skin on frame sailboat?
What, exactly, is meant by the recurring phrase "self rescuing"
Self righting I understand
Self rescue- in a canoe/kayak context means capable of being recovered from a knock down or capsize by the crew.
Puzzled.I'd much rather lay in my bunk all freakin day lookin at Youtube videos .Comment
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Re: skin on frame sailboat?
But, for solo cartopping, with stability, you might consider my Piankatank River Pram. She's a delight to sail, and very easy to get up on the roof of a car or truck. Probably won't fulfill one's need for speed - though she does move right along.
And, I'm happy to answer questions and/or offer advice whatever you build - including something to your own design.
DaveComment
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Re: skin on frame sailboat?
Blivit is not self rescuing. And I suspect that she could use some shroud/ partners beefing for longevity. Pretty much any self rescuing boats have to have tanks or bags. With all of the plans around for skin on frame sailboards, you might go back to the original Sailfish concept.... the first truly self rescue sailing boat. ( at least that I know of).Ben Fuller
Ran Tan, Liten Kuhling, Tipsy, Tippy, Josef W., Merry Mouth, Imp, Macavity, Look Far, Flash and a quiver of other 'yaks.
"Bound fast is boatless man."Comment
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