I understand your comments but - I can put a model into a flat spin right from level flight - Once the wing is rotating -like a prop - it acts much like a prop spinning.
the rotation is quite slow but will prduce no forward motion - simply a "auto rotation" type descent.
I would say the wing is stalled as one panel is moving backwards during rotation yet the plane does not roll over.
The angle of attack relative to direction of "flight" (?) is really high-- 90 degrees -
I have to call this flat spinning .
I love the Ercoupe -the design intent was really a great approach to a plane for the masses. the crap that got guys in trouble resulted from exceeding recommended speed envelope when trying to loop it-------.
You can't protect fools from themselves.
(Same thing happened here with a Bonanza)