Pitot heat

http://www.grc.nasa.gov/WWW/K-12/airplane/pitot.html
A Pitot Tube measures air velocity and is named after the guy who invented it. It tells you how fast you are going. You can see it on aircraft sticking out of the side of the nose.

Heat is applied to the tube in cold conditions where there is moisture present in order to prevent it icing up and so the airpeed guage failing.

thanks
Other question; What is yaw damper and x feed ,and when I use that

Good questions. I know what they do technically but can someone tell us how we'd use them in the Sim? I've never played with them.

Dave

And what are they?
thanks

Yaw damper dampens out any abrupt yaw as in assymetric thrust, etc, but also would limit rudder inputs at higher airspeeds. Xfeed is Fuel system. There can be a left and right fuel system. In the event that there's a fuel failure in one of the fuel manifolds/or a boost pump failure/ or to even out fuel weight from left to right side of aircraft, the xfeed valve can be used to transfer fuel or run left engines on right fuel system, etc ...rob