Quote:
Originally Posted by autogyro
which has an angle of 27 deg.
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I measured your angle by holding my adjustable triangle (old school drafting tool) up to my computer screen and measured the tangent angle at 15 degrees (approx.).
I think the "average angle" is the important part, call it the
tangent line angle if you want.
The angle at which air flow starts to leave is important, and that is as claimed; 27 degrees. However, the mindset of a designer says this is a 15 degree fastback, not a 27 degree fastback.
I just want to clarify this issue, as tossing numbers around can be misleading at times.