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Re: Screaming dromaeosaur biplane killers of the air



Jaime A. Headden wrote:
> 
>   No one has proven *Archaeopteryx* could or could not fly. It is a truly
> equivocal issue. .....snipped........., and its a
> sideline of low pectoral volume glider/poor flier....

None of which constitutes biomechanical evidence of poor flight ability.
It only impacts which flight 'niches' may have been more often used.  As
you no doubt know, flapping flight calculations indicate that archie
could probably climb at about 100-200 fpm, could glide about 2/3 as well
as a pigeon (or closer, if the tail could cascade -- tail cascading, or
the lack thereof, has not been demonstrated), and could avoid those
flight niches that require highly developed elevator muscles.  What's so
inefficient about that?  It seems sort of like calling a swan a slow
flyer.