Autorudder

That's to ease your job when flying. Computer adjusts the rudder automatically, so you don't have to. It's not a real world thing. It's just for us wannabe pilots and can be found in FS only. Try turnning that off and see how it is. Check this article so you get more aquanted wih this very important part of an aircraft. 😉
➡ http://en.wikipedia.org/wiki/Rudder#Aircraft_rudders

Thanks alot for that kwik reply..

Could you also tell me what the Yaw is?

Sure thing,

➡ http://www.grc.nasa.gov/WWW/K-12/airplane/yaw.html

Hope it helps! 😉

As I understand it, the Yaw damper will prevent the momentum following a turn, so that the Yaw is minimised.

I've posted a wrong link , sorry about that. I fixed it, now.

Air-head read this explanation
➡ http://www.boeing-727.com/Data/systems/infoyawdampers.html 😉

Ahh that makes more sense now... I didnt quite get the relevance of the previous graphic. 😀 Thanks! 🙂

The first link I posted abiut yaw was bad so I fixed it, and the second one is about yaw dampers. 🍻