[quote]Sometimes it's the wind but at other times there is no wind and no pilot in the front so why and how does the rudder move on it's own.
It is difficult to say as I'm always behind glass or fences so always have restricted view.But I would say,in most cases,the engines are idling.
So the pilots must be inside if the engines are idling...and hydr pump will be ON,so the rudder wont be moving by its own..