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Old 05-25-2020, 05:56 PM   #21 (permalink)
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Originally Posted by Piotrsko View Post
Gotta stop using those fat ugly gottengen style windmill blade profiles and at least use something like a Selig 737 tailfeather airfoil which are less sensitive to angle of attack and have a lower cd.
I'd be happy to experiment with different aerofoil profiles if you can find another so cheap and easy to use (eg another extruded aluminum one). The other extrusions I can fine are just generic ie no aero data.

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Old 05-29-2020, 09:27 PM   #22 (permalink)
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Originally Posted by freebeard View Post
I suspect that the leading and trailing edges are significant, but thickness mid-chord isn't.
I agree, but it must also be symmetrical, and chord length at some point becomes a factor in whatever the mid chord thickness is chosen.

All meaning to me, the thinnest possible at the requisite strength is the goal.

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