RE: E-flite PT-19 450 ARF flaws need help
They are called "warbirds" and that's how they fly ! They aren't pattern or aerobatic airframes. You have to apply rudder to take-off and sometimes in the turns. They do stall and drop a wing if you try and fly them too slow. They also don't handle well if you try and overpower them and fly too fast.
These are nice versions of the PT-19 and I believe the reason they didn't sell is that they were too expensive. Quite a few bought them on closeout a few years ago and they are built well and fly well.
You just need to learn how to fly warbirds and this is the best platform to train on. Easy, scale-like flights are best and learn how the plane reacts. Don't horse it up in the air or fly it like a 3D plane. It was designed as a trainer for WWII fighter pilots but it is not a high wing trainer and it will not right itself and it will go where it is pointed.
You didn't say what motor you are running in it but if it's a 450-480 size the prop should be a 10x8 or 12x6. The 9x6 is too small.