In order to bank the airplane and execute a turn properly, adverse yaw must be countered or eliminate altogether. The discussion of how to do this includes rudder control, aileron-rudder interconnects, directional stability, differential ailerons, aileron drag and the use of spoilers;
Two builders helped each other build RV-9As, each employing significantly different outlays of cash. The results are impressive in both cases, but for different reasons. They help us ponder the question as we build: What is something worth? By Marc Cook.