This morning before thunder and lightning, I did a revenge test flight.
This time, my AT-6 have U-BEC, no anxiety to be no-control.
At first, I tried gear up-down. It worked good.
The next, I did flap down and up, confirmed at a normal horizontal flight speed with pay attention sudden tip stall.
The flap works excellent as long as keep horizontal, no quick spin behavior.
Finally at landing sequence, with applicable flare and in stable, she landed smooth, as if anyone didn't notice when she touched down.


PS.
At this flight, I noticed why some people wants to replace more powerful motor.
As a scale flight, her scale flight speed is adequate with default motor, I think.
But if I want to fly with more relax, to get more stable horizontal and turning flight or want to perform basal stunts, more power is needed.
Actually, I almost flied with full throttle, it's not too fast yet.
I'll exchange more powerfull motor, or higher KV motor, if I have a chance.