da Rock, I've got a Nosen Citabria that exhibits the same rudder characteristics as your Decathalon[X(] Maybe that's why I use to see my share of "balled up" Citabrias and Decathalons in the scrap piles at various airports around the country! ". The Decathlon's rudder is worthless until the sucker is moving decently. Actually, on calm days, it's worthless. The airflow is screwed or something and there isn't any airspeed to clean it up. Whatever.... it's a witch in the calm. It needs airspeed to work and it won't get that until it's ground speed has given it that airspeed. But the blasted prop is working great at zero ground/airspeed. And will pull that sucker off the ground way before the airframe has even thought about working."