Wednesday, July 3, 2013

Perfect Foils

Proper foil shapes will have a strong influence on the performance of your sailing canoe.  It is especially evident when you decide to test your speed against a class racer with an experienced sailor driving.  Craig Walsh, one of my Ulua builders in Canada, shows a way to get that perfect shape:

"Attached are the pictures of the router jig for making foils that I recently mentioned.  In my experience as a woodworking teacher, there are people who prefer not to make jigs, feeling that any time spent not directly working on a project is wasted. I'm of the other camp; if I can break roughly even on the labour I prefer to make a jig. It's all gravy after that."
 
 
This router jig makes a NACA 0009 foil with a two point contact router base.
 
Router base
 
Setup ready to go
 
 
First side of foil with uncut strips to hold the blank level for cutting the other side.
 
 
Second side cut.
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