Horsten:
But, the Arduinos are too slow for your requirements.
Let's calculate:
The speed of your RC model is 100km/h. That's not fast.
That are 28m/s.The Arduino needs minimum 100ms to read the voltage (analogRead) of only one potentiometer,
Utter nonsense, and out by three orders of magnitude.
An R/C frame is 20ms (the minimum reaction time of typical R/C system) - in that time you could perform nearly 200 analogReads.
@Horsten: if you are new with Arduino systems I suggest you take a little time to familiarise yourself with it before pronouncing its shortcomings.