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Re: pteros have lift-off
Last question, how long of a run (in terms of # of footprints) --
to gain speed to load the forelimbs -- before the leap? Perhaps
zero for tiny pterosaurs, more for larger ones?
Zero for the largest ones.
Then how about the second largest ones?
I have a problem because in pteranodons, nyctosaurs and
ornithocheirids the tiny fingers are far forward of the glenoid, so
much so that the antebrachium is horizontal when terrestrial. Short
legs add to the problem. Somehow, then, the fingers have to move
behind the center of gravity so that the launch is in the anterior
direction, following your need for a 30º launch trajectory. I think
we talked about this earlier and the need for a pole vault scenario
(run followed by a hind limb leap) to shift the fingers below or
behind the shoulder glenoid.