5.2 Why does my Cessna swerve to the right on takeoff?

From FlightSim

If you get a problem of swerving to the right when you power up the Cessna it is probably caused by a chattery-joystick. Found out that although I was not using my joystick it chatters so much that it applied right rudder. Switching off the joystick solved the problem.

Edward B. Munns