The action you describe is correct. The tail surfaces on the firebird do not bank the wing directly. They act as a rudder to yaw the airplane in the direction of turn. This yaw causes the airplane to slip in the direction of turn and the dihedral (“V” angle of the wings) causes the airplane to bank in the direction of the turn, which turns the airplane. For a more complete explanation see my post in the “Aerodynamics & Design” forum dated June 3,2003.