Interesting plane, looks like a classic pattern model. I wonder why they added the fuselage fences, were they flying KE maneuvers back then?

I tested the fin fences and canalizer this weekend and got some interesting results. It clearly shows how the fences and canalizer work, their advantages and drawbacks, and how a simple change in shape may lead to radically different results. I just need some time to prepare the images, upload the videos, etc.