stressed ply multihull

[captainsideburn]

I'm still trying to work out why no one has recently designed in this method as illustrated in these 2 links
http://www.internationalcanoe.yachti...F13920%2F0%2F0
and
http://translate.google.com/translat...osCorner%2Ehtm
both designed by the same guy.
I want a trimaran in the 20-24 foot range in this technique, any comments on why nothing out there?
I might try designing my own adaptation of existing designs to this technique.

[simon]

http://www.multihulldesigns.com/ has Cylinder Mold designs which is a further development of stressed plywood construction.

[DarthCluin]

Actually Paul Fisher has designed a tortured plywood MOCRA compliant catamaran. The link is here:
http://www.selway-fisher.com/YachtCats.htm#AT
His plans are very reasonably priced too.
Here are some pictures of one under construction.

[captainsideburn]

yes I have looked at selway fisher's cat 254, it just doesn't seem to be a particularly modern design, and I do favor a trimaran, and simarly Kurt hughes 23' trimaran also looks dated.
I'm wanting something more contemporary, that takes advantage of more modern hull shapes.

BTW which boat is that you have pics for? and where did they come from?

[Gary Baigent]

Early stages, under development, Scissoring Sid - 7.62 x 7.98metres - scissors to be trailerable, 1/4, 1/2 wing mast/soft sail 11 metre rig versions, light weight total platform constructed in tensioned ply, glass, carbon, 3 bunks.

[captainsideburn]

ahh
been keeping an eye on what you are doing there, but didn't realise you were going to use stressed ply, hurry up
sounds very interesting, had a look at your stuff on small tris

[DarthCluin]

I think I found the pictures at SFD_builders_sailors, the Selway Fisher group on Yahoo. You have to dig, because there are a lot of pictures there. I have plans for the CAT 25, which is a 1983 design, however I think the 254 is more recent.

[Samnz]

Originally Posted by captainsideburn

I'm still trying to work out why no one has recently designed in this method as illustrated in these 2 links
http://www.internationalcanoe.yachti...F13920%2F0%2F0
and
http://translate.google.com/translat...osCorner%2Ehtm
both designed by the same guy.
I want a trimaran in the 20-24 foot range in this technique, any comments on why nothing out there?
I might try designing my own adaptation of existing designs to this technique.

just a quick look at the links seems like a very slow and weak method of getting the main hull shape. foam and glass would be a better option for this size and shape hull. Tortured ply floats say 4mm would be great for the floats tho, such as these ones I have just built http://crew.org.nz/forum/viewtopic.php?f=37&t=13308


sorry I cant seem to attach an image

[captainsideburn]

ooh,
that does look cool, do you have a link to the actual design?

[fhrussell]

There were 100's of Tornados built of tortured-ply and the Rudy Choy catamaran, Machete, is a 40 foot tortured-ply cat.

[fhrussell]

One of the challenges in building with this method is that it is not quite exact. A trimaran would be an ideal boat for this method, with only one main hull.

[captainsideburn]

they are really cool photos, but I am looking for something taking advantage of modern design innovations

[Samnz]

Originally Posted by captainsideburn

ooh,
that does look cool, do you have a link to the actual design?

no there is no design on paper it is all full size templates. We are looking into producing drawings for it tho.

http://www.blairboats.com/demon-85.html

This is the finished version.

[captainsideburn]

wow, that is one really nice looking boat

[Dan Cohen]

The west epoxy guys had stuff in their book on diegning this way and that guy in austraila the developed glass foam off a table to thin hulls