Same two questions that Flight Detent refused to answer:
100 kt airplane, 50 knot wind out of the east. Airplane flies east into wind with 50 knot groundspeed, then turns 180 degrees and flies west with a 150 knot groundspeed.
What is the velocity change from upwind to downwind.
Same airplane, no wind. Flies East at 100 kt, turns 180 degrees flies west at 100 knots
What is the velocity change from eastbound to westbound?
Delta v is of course 200 kts in both cases.
On a site inhabited by professional airmen (airpersons?) this is still going after 5 pages?