Archive > Real-world aviation

Pitot heat?

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EHM-1703 Philip:
As far as I am aware although I am not a RW pilot so coul be wrong,

Pitot Heat can be used in flight, all flight. Only in still air should it not be activated, when air is not passing in to the Pitot tube.

De-Icing can be used at any time but does have a detrimental effect on Fuel Efficiency.

EHM-1612 Paolo:
Ah, ok...thx for the help Phil ;)

EHM-1617 Iain:
In the 737, switching on Pitot Heat (called probe heat in Boeing lingo) is done right after engine start. It can be used whenever the plane has some air coming at it so as not to melt the tube.

Icing equipment is only when used when needed - i.e the temperature is between +3 and -20 (any more there's no risk of icing, less and the ice is too cold to stick to the plane) and there is moisture in the air.

EHM-1199 Philip:
Wow! Fascinating and detailed replies, thanks guys. Never would have realised that below -20 there is no ice formation. My use of pitot heat and de-icing will be better informed now. Thanks again.

EHM-1703 Philip:
Well if it improves your simulator experience, then that is great! My dad was an Electronics Engineer in the RAF and one of his responsibilities was  replacing Probes on VC10's after Pilots had left them on and burnt them out!

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