Both are based on NACA profiles, based on which I cut guide grooves with the circular saw that I used as a guide to give the blade a proper shape, using the power planer, the orbital sander with a 40 grit disc, surforms and sanding pads. Here we are after a while
This is hard work, and produces a mountain of sawdust. The nice thing is that one can use the plywood layers like interference fringes in optical surface figuring :-)
Next pic shows Cinzia in the background finishing the daggerboard while the rudder blade is on the sawhorses.
Here are the NACA profile depths for the rudder blade
Total work time to date: 432 hours
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