• Fastenings wood screws and glue, screws spaced 3" apart

  • 112 1.75" #8 screws for gunwales

  • 274 0.75" #6 screws for everything else

  • metal oar locks as desired (3 shown in drawing)

   

• Scantlings:
  framing cut from a 10' 1x12 board with .0076 cu ft sawn to waste.

  • gunwales 2 each 14' double thick .875"xl.5"

  • chine logs 2 each l4.25'x.875"x.75" beveled 26.39 deg

  • deck stringers 4 each l'x.875"xl.5" beveled 26.39 deg

  • deck spreaders 4 each 2.75'x.875"xl"

  • hull spreaders 2 each 2.75"x.875"x2" ends beveled 26.39 deg

  • hull spreader ends supported on 3"x.875"x2" beveled blocks

This boat has the same outside dimensions as a canoe but Is the antithesis in shape. It was designed mathematically using a computer program to arrive at an optimal two sheet model for the competition. A copy of the open source computers program can be taken from file InverseLoonie.bas on  https://www.ncf.ca/~ag384  . I hope you will derive enjoyment from using the computer program to design boats of various sizes with this shape. As Barend Michelson points out, hull shapes can be truncated for different uses. Hulls of this shape can be nested.

notes: 

mathematics - the hull is cut from sheet goods using arcs of two circles. It is analyzable mathematically using geometry and trigonometry to calculate angles, lengths, areas, and volumes. The computer program displays construction measurements. It displays points on the arcs for drawing with a batten.

model - the enclosed taped seam paper model shows the shape of the hull in three dimensions. It needs to be removed from its plastic wrapper and to have the edges pulled together as the tape is folded over them. The edges may have to be pinched to take their shape.

construction - It may be obvious to note that the two sheets of plywood can be clamped and cut together. And that one Side can be cut off and used as a template for the other. The boat is good for either stitch and glue or beveled chine log construction. For completeness the design shows the latter. The bevel is constant. Interior and exterior chine logs are equally facile to attach as there are no interior corners at bow or stern. Also
obvious, the chine logs are attached to the side panels first. The bottom panel is bent onto the sides. Quarter inch plywood will bend to the bottom radius which is displayed by the computer program. The flat sides are lacking any extra strength from bending so spreaders have been added 1/4 of the way in from each end. One foot is sliced off each end of the 16x4 butted plywood to put on the ends as bow and stern decks. I'd suggest they be attached down between the sides at the level of the bottom on beveled stringers. The bottom is slightly shorter than the sides due to the differing lengths of the arcs. The ends of the sides can be rounded off to match the bottom. The computer program estimates the amount to be trimmed off but It is best to wait until the bottom and sides have been joined. I like to drill holes in the decks or framing of small boats for painters and tie downs instead of buying and screwing on deck hardware. The extent of temporary construction molds, if any, is left to the builder's discretion. 

propulsion - oars for rowing, poling, and paddling. I prefer to buy inexpensive oars from a discount sporting goods store and reinforce the tips with fibreglass and resin. I prefer less
expensive marine polyester resin available from the same discount sporting goods stores, drilling small holes in the wood to help he resin adhere. The oar tips will have to be built up at the start of each season. There are so many configurations and preferences for fastening oars to hulls that I hesitate to specify one for the design. Metal oar locks are purchased with the oars. They can be screwed right into the sheer as the sides are high enough to provide the required seven inches of clearance. The oars will be used sitting and kneeling on the bottom. Eye elevation is helpful for viewing ahead in these waters. A lightweight floating cushion/kneepad can be made from blue foam. For those who prefer a chest high oars they can be fastened to sticks poking up above the gunwales. Such sticks can be pivoted on bolts through the gunwales to fold out of the way. An oar can be hung outboard of the gunwales to be used for steering by mounting an oar lock on an extension of a spreader as shown in the drawing. An interesting device is a U-shaped frame across the gunwales with a back rest in the base of the U and the oar locks at the ends. This sort of device can slide along the gunwales for fore-and-aft trim, and it better braces the gunwales at the right spot for rowing than do spreaders. It can serve as a carrying yolk when portaging. 

Addenda;

a) drawing showing top, side, and end views

b) drawing showing material cutting patterns

c) sketch of boat

d) listing of computer program

e) taped seam paper model of hull shape