[EricButton]

I think it is also affected by the slight increase in ground effect as the wing flies closer to the runway surface. so the pitching down is somewhat offset by the increase in wing efficiency--and probably a set of other interplaying factors. The G280 has huge barn-door flaps that extend well below the wing, so reducing the distance between these flaps and the runway may result in an appreciable increase in lift (the wing is affected by ground effect if it is <1 wingspan from the ground)