Not sure if it's worth getting back into this again, but just to clarify, my rough
calculations (over a year ago) indicated that steady state maximum running speeds were
unlikely to be effectively assisted with wings. They also indicated that assisted
running in the sense of augmented burst accelerations, leaping distance, leaping height,
and turning radius should all be possible. There have as yet been no published data to
contradict either of these suppositions, and several published datasets supporting the
"agility" factor augmentation. If you know of force-measurement studies
showing otherwise, please let me know - it's not as if I don't make mistakes. I may have
made an error in my calculations, but I haven't found one so far. With all due respect,
as well, observations of baby birds flapping while running is not empirical evidence of
assisted running in the sense I think you mean it.