This is the Speer-section I simulated:
You can read his paper here:
This foil probably performs better than the arc with flat bottom section, since it has been developed and investigated with a nice software by an educated man (Tom Speer).
His software doesn't work with sharp edges though, so cannot asses the performance of the foil you are suggesting. But since the camber is half of the thickness for your suggested kind of foil, it will have a really high camber on a foil of normal thickness (10-12%), so will have to be set to a negative angle of attack in most sailing conditions I think.
On Wed, Mar 27, 2019 at 7:18 PM realink@iprimus.com.au [harryproa] <harryproa@yahoogroups.com.au> wrote:
> Perhaps i miss understand. If you lop a section off a cylinder it is a foil, but I thought you had to 'bend' it to make it cambered?if you plot the midline of a cross section you can see it is already cambered> Ya, but, why, when one could use tspeers P3 and get less drag?yes but can it go backwards or forwards and give identical results
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