Quote:
Originally posted by XPLORx4:
Quote:
Originally posted by BlueSky:
[b]Do YOU understand that those two things are irrelevant if the plane is stationary on the ground and has not achieved flight?
No, I do not, because airspeed and groundspeed are relevant at all times. A moving car has both airspeed and groundspeed, do you agree? (If you don't think a car has airspeed, stick your hand out the window). Additionally, a STATIONARY car can have airspeed without groundspeed on a windy day.

The same things apply to aircraft, whether in the air or on the ground.

Do you agree?[/b]
Yes, but I said the aircraft is STATIONARY. Assuming no wind, it has no airspeed.