The US Aircore is made of what appears to be corrugated cardboard or it might be plastic dipped in wax. This makes the plane very durable but also very heavy. From the Aircores that I have seen they wouldn't turn very well on rudder alone. At our field we call the Aircore "the lead sled". The PT 40 that you have listed would be much better. The PT 40 has 2 dihedral settings to choose from. If you want the plane to be able to turn well with rudder then use the larger setting. In other words you will want more upward angle in the wings which is also called dihedral. The larger setting is actually more than needed if you are using ailerons but would work well with the rudder. The problem with the larger angle is that the plane will constantly be trying to level itself from a turn and it tends to get blown around more in windy conditions. [X(]