Pitot tube at URL;
http://www.grc.nasa.gov/WWW/K-12/airplane/pitot.html

Re Pitot Heat -- see URL:
http://www.allstar.fiu.edu/aero/PSSI.htm


Sez
The system shown employs a heated pitot tube to prevent ice formation, a
necessary feature for flight in instrument conditions.
--
ID with held to protect the innocent



What is a Pitot tube anyway? I have seen a switch for most aircraft
in Flight Simulator marked "Pitot Heat", what is that?