Ground Effect and the 777
Has anyone done any detailed study of or have knowledge of the impact of ground effect on the last say 100 ft AGL downwards on the B777 and B744. Just trying to filter out the impact of ground effect from pilot induced changes in that last 100 ft using our FOQA data.I know there's some logic built into the control laws on the 777 FBW system to give a pitch down at 30 ft so as to prompt a positive flare but other than that there's not a lot of detailed info around on what will happen as a stabilized in trim heavy approaches the ground.
Thanks