I don't understand how local rotation is working

[GLeBaTi]

I have a code:

forwardRudder.transform.RotateAroundLocal(Vector3.up, 2 * Time.deltaTime);

but he is rotate the rudder in global(not local) Y axis. Why?

Pivots:

[whydoidoit]

RotateAroundLocal - is not documented and in fact I believe works in radians not degrees - as it is undocumented it’s function is not guaranteed.

You could try this:

  forwardRudder.transform.localRotation *= Quaternion.AngleAxis(2 * Time.deltaTime, Vector3.up);