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Hi, in some cases it is hard to get the exact position of the leading edge of a NACA profile, because the t-parameter (curve parameter) is not at 0.5 anymore. That is why I wrote a small feature which finds the t-parameter for the point which has the longest distance to the trailing edge. Furthermore I included a few lines in the feature to measure the elapsed time. This can be helpful to optimize your feature. (Thanks Stefan for this.) regards Carsten FindNacaStart.fdb FindProfileLeadingEdge.fdf
Entrance angle measurement
Mr. Iorga Stefan posted a topic in MiscellaneousHello, I was wondering if there's a connection between LCF, area of WL, etc., in order to find out a proper distance from the transom (let's say) to the tangent point, from which the half entrance angle iE is measured. Sadly, I can't find any reference for this matter. See the attached image. Thank very much, Stefan