[Tesla]

Xist, thanks for overlay, the curve is definately more agressive then original template, I was thinking it is much closer to the new version below with the steeper angles at the start.
3 Wheeler, I manipulated both constants until I got exactly 2.5 aspect ratio and 1.78 tail ratio, to get this M = 1.4754408 and l/w = 1.9130000020752, the original values for the constants of 1 & 1.925 gave a tail ratio of 1.67 and yes is still increasing angle at end of tail, but does not fit template that well either.
I like this equation and will fiddle a bit more and try out different combinations, I can get a closer version with less kink in tail, but the aspect ratio is around 2.54 with a 1.78 tail ratio, so there are plenty of options to choose, later tonight I will try put up a version where the tail reaches max curvature without changing direction.

Originally Posted by betasniper

Yeah, It was about a 15° angle at the end for that one because the thickness was only 35% (Eppler 863). I posted that airfoil because that was the largest symmetric airfoil I found in that database. There is a very slightly unsymmetric airfoil which is a 38.8% thickness (Eppler 864), but even that one only goes to an 18° angle.

I put the AST-2 Template into Solidworks and tried as best as I could to make a simple spline fit the Template but These are the angles I got:

Largest deviation (angle wise) was the very first angle with a 1.3° discrepancy. Everything else is within .4°. The grey dimensions are driven and Σ's are equations. Only the black Numbers without Σ can be altered (The 500 and the 23°). The blue lines above the spline represent the curvature. Bigger lines means more curve, Smaller lines means flatter.

Edit: Even though the angle discrepancy is large, the spline I drew was slightly slower curve than the template. Very slight.