Thread: International Sailing Canoe Folder

Well, work on the Goat Island skiff has stalled out a bit. (-5 to 0 celsius in the garage, guests in the spare bedroom) , so I've been having a play with imaginary boats. Nearly as much fun, and lot's cheaper, at least while they remain imaginary.

The design I'm playing with is a sailing canoe on the IC10 dimensions, but capable of folding up and going in a bag. Big rig and some extra bracing plus leaning plank or similar for going fast close to home, smaller rig for cruising/putting it on the bus or aeroplane and the hull big enough to cruise with two plus gear on board. I've tried to get the underwater lines quite close to an IC10 sailing canoe.

Construction: Similar to my very narrow single paddling kayak: Folding Sea Kayak - a set on Flickr

Carbon tube stringers:
I can use the same carbon stringers, would consider upgrading the gunwale stringers to 25mmID/28mmOD tubes, but I'd probably build it with the ones I have, see if the concept works and/or needs heavier tubes on the gunwales

Crossframes:
Each of paulownia sandwiched betwen two laters of 6mm ply, should be very light and stiff.

Skin:
PVC as with the single kayak or possibly aircraft dacron with hypalon coating

Other Structure:
4 m Ply box structure between bulkheads 2 and 3 (counting from the front) to take torsional loads. 4mm ply floorboards between bulkheads 3-4-5, hinged down the keel line with timber cleats either end and along the outer sides so they can bolt into these crossframes and help with stiffness/torsional loads. Some bracing with webbing to help hold it together.

Rig:
Have drawn it with a 60 square foot lugsail, would be curious if anyone has ideas on ideal rig for IC10 performance on the cheap plus ability to reef right down for coastal cruising. (Or two separate rigs?)

All up weight under 20kg?

Idea is to get nearly all of it out of scraps from existing projects.

Thoughts from anyone?

(PDF can be zoomed in as far as you want for more detail)

Ian