MaxSurf profile question

When making a 0009 profile MaxSurf and comparing it to a published 0009 profile in "Theory of wing sections". There is a significant difference around the forward 20% of the profile...

The published profile is blunter and slightly thicker than Masurf's built in 0009 profile.

Why the difference? Andrew?

 

Erik

You appear to be correct, the section looks to be wrong. I have redone the fit using Maxsurf Pro's surface fitting code and this gives the following control point x and y positions -

-1000.0 0.0
-940.9 7.3
-800.5 20.9
-593.2 35.3
-370.2 46.7
-176.0 43.9
-79.3 34.5
-1.4 16.7
0.0 0.0

These co-ordinates are in millimeters and are using 9 control points and order 4 splines. I will ammend the 0009 template in the shipping version of Maxsurf to reflect the corrected control points

The fit for the leading part of the aerofoil looks like this, compressed 4:1 along the longitudinal axis -