Originally Posted by
Old Boeing Driver
How did you calculate the IAS?
I converted vertical speed from FPM to knots, then calculated the hypotenuse (vector if you will) speed. A year ago or so I ran across a reference which gave as an estimation between TAS and IAS: (TAS/(height_in_ft/50000+1)) [don't have the link handy as it is on my work computer]. From that I roughly estimated at the altitudes in question TAS~= the above calculated speed + head wind. All quite rough, not having an E6B.
If I can improve upon that given the FR24 and sounding data, I would love to do so!
