Originally Posted by
GordonR_Cape
Dumb question (not a pilot): What was the approximate indicated airspeed (IAS) on these flights? Was the ground speed (sum of true airspeed plus wind vector) more than twice the IAS? If so, is that interesting in any way, or just a numerical coincidence?
The relationship between IAS and TAS isn't really affected by whether there's a tailwind or headwind.
I'm looking at an overflying EK B77W that's reporting (via Mode S) a TAS of 476 kts and IAS of 289 kts, which is pretty typical. Given those 200 kts+ tailwind components that we're discussing, that would give a GS that's well over double the IAS, but I wouldn't attach any particular significance to that.