Hello thanks for your quickly Answer.
The problem is : full Aileron left or right Side , = 20 grad. Turn
My Setting is 100% Realistic.
Possible my FSX is defekt. ?
The default Cessna 172 is Ok. I Have REG. FSUIPC / Saitek X52 PRO Flight / Windows 7 64 bit / Frames 35-70
Elevator und Rudder is Ok.
I think I'm understanding that when you apply full aileron either side the result of that can only produce a 20 degree sustained turn?
If so, there is something wrong but it sounds to me like it might be in your controller driver or a possible conflict somewhere in the FSX controller settings for your aileron axis.
Check carefully in FSX and see if you have more than 1 axis assigned to your ailerons. If you do, uncheck one.
Then recalibrate your controllers and see if that clears it up.