I am a long way away from scale ailerons on my 103, partly so that they need more than a sneeze to fully actuate. If you are building an LSA, this may even be a good thing. Cusped airfoils also have higher stick forces. I think this was the major reason for the cusp-less airfoils.Ģ. the cusp airfoils are very thin at the TE, this can involve them being fragile. The cusp-less 6 series have a couple of benefits.ġ. I believe that profili uses the same airfoil code as XFLR5 While XFLR5 has some accuracy issues, I think that they are fairly consistent so it is useful for comparing similar airfoils. XFLR5 was not impressed by his modified 4 digit thickness. I firmly believe his good results in his GA30 airfoils are entirely from using the a=0.5 6 series camber line with 4 digit thicknesses rather than his method of combining them. Though I want to get around to trying them the NACA way when I get a round tuit. So far, the results using his (easy) method look ok for my XFLR foil experimentation. I am somewhat skeptical of Riblett's method for adding thickness and camber line.
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