Originally Posted by 52larry52

acdii, Have you looked at the "alignment" of the main gear wheels? Both wheels should point forward at the same angle with just a very slight toe in. At low speed before the rudder is effective the tire angle is going to dictate where the plane is headed. Also, as you apply throttle starting on the takeoff roll do you slam the throttle quickly to full throttle, or feed it in very gradually as you pick up speed? Are you flying off grass or a paved runway? I normally fly off grass but when I do fly off pavement I find my Cubs and other Cub-like taildraggers require extra smoothness on the controls (both rudder and throttle) or I will start the zig-zag tail chasing heading for a ground loop. Once you start that zig-zaging it's best to abort the takeoff, line back up and try again. Taildraggers on pavement are much less forgiving to any combination of misaligned wheels and or over sensitive control . Once the tail is up, all steering control is from the air on rudder surface and the main gear wheel alignment if you are feeding in the power gradually. Just some random thoughts on your problem. Also check that the tail wheel is parallel to the rudder.