Re: pteros have lift-off

[jrc <jrccea@bellsouth.net>]

----- Original Message ----- 
From: "David Marjanovic" <david.marjanovic@gmx.at

> Could it have ended with everything _except the wing finger_ fully extended 
> and vertical, then an upstroke, and only then a full downstroke during 
> which the entire wing is extended?

Yes, though the wing isn't quite in the vertical plane and the wingfinger is 
partially opened by the time the manus leaves the ground (though wingtip 
hasn't extended enough to be horizontal)).  The wing locus strongly 
resembles a typical flight upstroke by the latter half of that first 
upstroke.  The first downstroke is typical of any downstroke.

> This would of course require that the pterosaur continued to move upwards 
> during this first upstroke, powered by leftover inertia from the leap.

It is also partially powered by the forces developed by the wingfinger while 
initially extending.

> Whether the power for that was available is testable.

It is.