> I'm sure you'd want to have a Big Flashing Warning Light telling you that ground speed <> air speed That light would never stop flashing. :) Once you get up

> I'm sure you'd want to have a Big Flashing Warning Light telling you that ground speed <> air speed That light would never stop flashing. :) Once you get up a couple of thousand feet, even if the flag is hanging flush against the pole on the ground, you're going to have some type of air movement. The higher you go, the higher the windspeed (in general).