I cannot turn when on the ground

[Psit]

Hello, i am pretty new to all this ww2 fighter mumbo jumbo and i cant understand the following:

Why does my plane turn by itself, or it refuses to turn where i want it to when i am on the ground.

I did a search and some replies talk gibberish to me, can some1 explain plain and simple how i can make it work, and no i dont have rudder pedals, i just have rudder on my stick.

The planes i try to turn are the spitfires and the hurrrrrrs.

Thank you.