I have a Hanger 9 PT-19 with a Saito 150 in it . The plane is heavy but I don't think unmanageable so . It was designed for 120 .

It does one strange thing, maybe two , maybe they are the same .

I would appreciate any help anybody can offer .

When taking off ,just after it lifts off the ground , maybe two feet high , it drops the left wing . It requires a fast correction to avoid a disaster . No matter how fast I take off it will happen. I am not sure what would happen if I took off less steeply and with lower acceleration. But this little habit is quite bothersome.

It also has a version of the same thing upon landing . If you land too slowly it will stall - without warning and drop straight down . If I hit the gas quick enough it will drop the left wing and maybe start flying again or spiral in.

Now they way I get around it is too take off slowly with a long run - it is a tail dragger so if I am not careful with throttle it will nose over. And keep the speed up while landing.

Some of the people at my field say its the lack of right thrust in the engine. There is none that I can detect in it now.

Others say the plane is not lateral balanced and needs more weight in the right wing. I checked this and it seems balanced . Adding weight to the right wing does seem like reasonable solution.

It is a very attractive plane and supposed to be a military trainer so I would have expected it to have very predictable flight characteristics.

But it in current state it is not exactly a Sunday Flyer.

Your thoughts pls , ideas, questions all welcome