flat spin problems, what is causing this death spin.
York:
I am not the ultimate information source, I have been known to err.
But I will draw your attention to Cessna. The late 150 series is advertised as having "Hoerner" wing tips.
The wing tips on the late Cessna 150s curve down.
Maybe "Hoerner" has to do with the vortices generated rather than a particular curve?
Twins with Hoerner, are for a fast burner.
Bill.