pitot tube down

"Emilio" wrote in message
...
A portion of thread from different news grope:

loss of a 757 a few years ago in which clogged pitot tubes
caused bad overspeed warnings; the Turkish crew pulled
back the power and stalled and crashed. It was later determined
that the A/C had sat for a month and insects had gotten into
uncovered pitot tubes.

With aircraft equipped with GPS that shows your true speed, can you fly by
it when pitot tube is down?

Emilio.



There's a risk if you do. The GPS will give you the speed over ground
but the pitot gives you airspeed. If you were flying an aircraft
with a stalling speed of 120 mph downwind and the GPS
showed 150 you could stall if the tail wind was more than
30 mph

Keith