I just checked my plans. It was an Eppler 197. I don't think the airfoil was the cause of the tip stalling. the biggest cause was the person typing this message, who was at the controls. The second biggest cause was the person who built the airplane 1/2 lb heavy (same guy).

But, I have never had an airplane that stalled so catastrophically. If you did not have a couple of hundred feet, it was hopeless. So I'm nervous about the 197.

I have checked out the UIUC website. It is an amazing resource, and should be bookmarked by all.

The E197 is a 13.49% airfoil. A 16% airfoil should be gentler, and the entry looks a bit more gentle too. That's why I want to try it. No disrespect intended to Dr. Eppler.

Let me ask a follow up question: do you think I need washout, and if so how much?