On 10/7/2011 12:05 PM, Richard W. Travsky wrote:
Went to youtube to see if there was any footage of ostriches running (the closest thing, hopefully, to arms and running) and found http://www.youtube.com/watch?v=1r-b8uY7C9E&feature=related For the most part the arms/wings are kept against the body but noticed in a turn they splayed out to assist with the turn. The feathers are probably contributing to the assist, like dive breaks...
Being knee-walkers, ostriches may not be analogous to basal theropods relative to investigating Allen's pitch-down observation.
Maybe a mechanical model?