Just archiving and contemplating Bernard’s tests and analysis of the crab claw sail using a home-built wind tunnel. It’s inspiring to see sketches and photos of his experimental set up, but they aren’t very accessible as of 2016. For example, you can’t find the link to his Yahoo-based “wind tunnel” data files in the English version of his analysis; the links are only at the bottom of the German version of his analysis. Once you find the files, each must be downloaded separately, and some do not have clear context. Hopefully this post will make it all easier to find, understand, and advance.