Originally Posted by dirtbagkayaker
I think for this to be true you would stay away from some deep V designs that most Biyaks have.
I would think one could pick up a couple old overflows or similar real cheep and make a cataraft type frame. I think that would be the ELF beast!
Flat bottom, 13 to 14 ft, Rotomolded like a DOT drum, allows access to bony creeks in August where the inflatable cannot go. This affords two to kayak in and converge to a cat and have the ability to be dragged over rock bars. One can rotomold semirigid LLDPE for 3 to 4 bucks a pound. This is about fish that have never tasted a hook.
The Biyak that I'm referring to was designed for the roaring fork by a gentleman named Gardner. I think it was his first design. It had roto-cast recesses for frames and coolers. Perhaps not the best design out of the gate but there can be improvements. The concept of dragging the boat over rocks is driving this. 2" displacement 36" wide x 11 ft x 2 hulls is better than 640 lbs (500# net buoyancy at the 2" mark). Depending on the shape of the upper portion of the hull, one could achieve 2000 to 2500 lbs total displacement. There is another BiYak out there more recently with the claim patent pending hoping to dissuade competition on the prior art.