Faulty rudder pedal authority

[Viper99]

The rudder is controllable in all speeds which is wrong.

Basically you can apply full rudder when supersonic and the plane would brake up. 

In the real Viggen the pedals are locked with hydraulic pressure (250 bar) above 550 km/h to protect the fin.

The FCS might apply corrections on the rudder above that speed, but exact control laws are unknown to me.

Other
Maximum rudder angular velocity is about 60 degrees/s. That goes for all rudder surfaces.
Maximum roll speed is about 275 degrees/s.