Skin-On-Frame Outrigger Sailing Canoe. Chapter 1: Deck, Keel and Cockpits

Step 3 Pointy Ends and "Breasthooks"

We used a sabersaw to cut the ends of the decks pointy. Blunt and pointy anyway. Two such pieces butted up would make our canoe 16 feet long, which is perfect. I drew lines around a tin can to make the ends a 2" radius curve. I laid a flexible ruler on its side and bent it into a graceful curve to draw the taper from the straight sides to the rounded tip. I cut that out with a saber saw and shaved it down with my little wooden plane. Then I flipped it over to trace onto the other piece. Then I used that as a pattern to finish the first one. That's how I got them symmetrical. The ends look like gothic arches.

The remaining third of the sheet of plywood was cut up into more gothic arches to laminate onto the tips to make them strong. That part of a boat is called the "breasthook".

Describing the end of the deck and the breasthook:
What curve is the taper of the deck end (top view)? Nearly a "segment of circle" arc. The curve merges with the edge of the deck 2 feet from the tip. The curve is tangent to the edge of the "blunt tip circle".
The breasthook pieces are 3 feet long. The cutaway starts 1.5 feet from the tip. At the 2ft point the "leg" of the piece is 4" wide. At the 2.5ft point the leg is 2.5" wide.