[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: hovering pterosaurs

David Peters wrote:
> S. Pickering wrote:
> Hovering is energy costly, constraining the size of
> the animal involved. Thus, it seems doubtful to me
> that hovering among pterosaurs and pre-K/T feathered
> dinosaurs existed.

Stephan, does this take into account the ability of the pterosaur
membrane to invert camber and create lift on both the down and upstroke
when the body is held at a high angle of attack?  For the species you
are interested in, when you approximate the process using modified
propeller momentum theory, what sort of power seems to be required vs.
the probable power available for that particular species?  And are
pre-K/T feathered dinosaurs anything like birds?

All the best, and Happy New Year.