On Sep 30, 3:13*am, Clark wrote:
D Ramapriya wrote in news:2c0fab6a-a8d4-4889-a0ef-
:

As for the accuracy of the airspeed indicator, well we generally stall the
aircraft in training and proficiency flights so we know exactly when the
stall occurs even if the indicated airspeed might be in error. As an aside,
the aircraft will usually tell you through handling characteristics and
vibration that it's going to stall. The aircraft that don't tell you about
the impending stall are the ones with which to be very careful.


Thanks, especially for the above bit. Don't know if it's because
someone once told me or something I'd read somewhere but I was under
the impression that when flying and if you didn't have external visual
references of the ground, there's NO way that a pilot can know the
airspeed of his aircraft.

On another matter, everything I've read so far about the AF447 crash
suggests that the aircraft was upset because it flew too slow (iced
pitot leading to erroneous airspeed readings) and pretty much went
down like a bag of cement and possibly hit the water at a nearly level
attitude!

Ramapriya