: Has anyone any information on a SOF tandem? I am coming up empty in a search
: for this type.

Clarkcraft has plans for some. www.clarkcraft.com

Pictured below is their BK 22, which they call their "kayak canvas, roomy open double 15. It is 15 feet long and has a 30 inch beam. it holds 550 pounds and has a single cockpit that is 6 feet long, so it can be paddled by a solo paddler who merely slides their seat to the center. Dog (cat?) or small child can be carried between two adults, too. Their plans are $30 US and include plans for a sail rig, cockpit cover, and paddles.

They also have three more plans for 17 foot long doubles:

The bk18 "Roomy double" (17' x 32" and 1000 pounds displacement) with a cockpit 8'6" long)

the BK29 "Racing double" (17'4" x 26" with two 42-inch-long cockpits)

The BK19 "folding double" (17' long & no other specs) The picture with this looks the same as the one with their 13 foot long folding single, the bk 12 which I have been working on as a test platform. Int he shorter version the beam is 27 inches, so I'm guessing the longer version is simply scaled up a bit.

By the way. Building this as a NON folding boat was simple and rather fast. The ribs and stems are cut from plywood and held together by stringers. The plans called for 1/4 inch wood for floorboards, I used 1/4 inch plywood. A day to cut the plywood, a 1/2 day to scarf the wood for the stringers, and another 1/2 day to rip the wood to size. Then 1 day to assemble the frame. Another day on a cockpit, and you can skin it in a day. After that, it is just paint. Do this over four leisurely weekends and you'll have a pretty boat.

Oh, and don't forget that the Walrus design, particularly the 18 1/2 foot version, is a nice double, too. You can read about that in the book on canvas covered boats by George Putz. If you like that design, check back and I'll send along my recalculations for the plan's design numbers. Putz expresses them in terms of arcs, I've redone them as a plain coordinate system that makes plotting them easier, and allows you to use less wood. Same boat design, smae shape frames, just a different way of describing how to cut them, and you'll sae about $15 on wood.

Hope this helps

PGJ
PGJ