I have a Superstar .40 (Flat bottom trainer) I fly occasionally and I've noticed that when I put it into a turn, the tail actually drags/sags unless I pretty much make it a knife edge turn. The plane is nose heavy, but I don't see how that could make the tail sag. When it turns it looks like the tail weighs a ton and it just being dragged along by the engine. I would think it was tail heavy but I KNOW that it is in fact a little too nose heavy if anything. Any ideas on what might be causing it or how to correct it?

Thanks,
Rick