Cardboard Boat for the 2013 Toledo
Toledo is home to a Georgia Pacific pulp mill, and one of the products
is container board - what we normally call cardboard, the stuff
with two smooth sides and a ruffle in between. It comes in sheets
77x110 and is 1/4" thick, we get two sheets and usually two
5" dia, 8'-ish long tubes.
Here's the rules for
the build (last year's rules, anyhow.)
Last year, we made boats based on the Cardboard
Boat Book and they were great and all, but it's time for something
of the build
of the boat show and the race
Originally, I was thinking of just gtting some silly Make a Paper
Canoe pattern, like this one from the Kid's program at the Denver
Museum of Art
I even made a model of it
Sadly, it's too . . . frilly for me. I cogitated a bit moer, then
ermembered the movie "Ten
Canoes" where some Australian aboriginals made caneos out
of tree bark - they literally just pinched the ends together. Inspiration
came shortly there after.
Design Constraints: Must hold more than one person, assembled with
contact cement, and painted for waterproofing. It should be sturdy
enough to make it to the end of the course and back, but since I
won't be in it, that's not manditory.
First sheet is easy: the 45" wide piece will make 1/2 of the
hull. The 32" wide piece will be the cockpit. It will make
the bottom double thick and also limit where people can be in the
boat (saves us work.)
In the second sheet, we get the 2nd half of the hull and four ovals
that will make up the inner structure of the canoe. The hull will
have a beam of 34", making paddling easy.
Step 1 is to make the cockpit. The bulkheads will be slightly over
36" apart, plenty of room for a kneeling paddler (not built
for ccomfort.) The bulkheads won't be exactly flat - they'll be
slightly V shaped to increase rigidity. The little fringe thingies
are just for glue area.
Next is to attach the hull pieces. You may notice I'm erlying on
the cardboard to curve uniformly. My plan is to roll it first. The
ends are simply pinched together. It'll still be rigid fore and
aft. Seams will be taped with drywall tape (paper, not fiberglass.)
Paint is just regular exterior house paint.
Here's the model. Final verson will be 18' 4" long and 34"
wide. It's symetrical and teh cockpit spaces are evenly spaced,
so it won't turn worth a poop, but it should be sleek and fast -
two paddlers ought to make it go as fast as it can possibly go.