On May 18, 1:03*am, WingFlaps wrote:

As *a matter of fact, during training my instructor regularly blanked
off the ASI in the circuit and yet I still managed to trim to the
correct final approach speed to within 4 knots (as revealed when the
papaer was removed). Explain that -and no I'm not a very gifted
pilot...

Very good excercise IMHO.

Friend of mine posted in these forums that the pitot tube ingested a
bug. While he may have had better odds hitting the lottery, things
happen IN FLIGHT.