I think in fsx rudder input on the ground is bypassed since the same control is used for steering/nose wheel input. Even with out rudder on, there is no controllable rudder in flight but as soon as you get on the ground it works to steer. Just my observation thus far. On C-130's it was off for takeoff/landing, otherwise minimal rudder control which could cause control difficulties to overcome p-factor, etc
Also the rudder wont do anything until 60+ knots! that's why pilot will have one hand on the nose wheel steering and one I. The throttle until the rudder becomes 'effective'
Once the rudder is effective they will transition to the yoke/throttles