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Canoe Sail

Step 2Leeboard

Leeboard
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The leeboard is an aluminum street sign 2 feet square. The corners are round and there are two holes in the top edge near each corner. I tied cord to these holes and tied the other end of the cords to the canoe's center thwart. I wrapped some innertube around that to make sure it wouldn't slip.

When I tack and turn the canoe so the wind is on the same side as the leeboard it swings up.
I pick up the leeboard and toss it into the water on the other side of the canoe.

The leeboard should be just in front of the center thwart to balance this sail well.
Then it's very easy to steer with the paddle.

When things are right the canoe will turn into the wind when you pull the paddle out of the water.
You'll have an easy time steering and water pressure will hold the paddle against the leeward side of the canoe. This set of conditions is called moderate "weather helm".

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Author:TimAnderson
Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...
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