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Re: pteros have lift-off
It should also be understood, and I'll say it again. I can accept a
quad lift-off for Q. sp. and northropi. Those taxa are no longer the
issue. I'm interested in the pterosaurs with shorter legs, weaker
pectoral girdles and much, much longer wings.
I understand your expertise in Q. And, uh, since this is a forum,
I've kept my questions on the simple side, understanding that the
flight stroke is complex, but certain segments of it, such as when
the wings are vertical, or nearly so, during terrestrial locomotion
and immediately following a lift-off, are simple.
All I want now is minimum flight speed and apogee as a multiple of
the unit specified by CG height at the beginning of the leap. Been
gone all day. No reply, so far, to those queries.
On Jan 13, 2009, at 8:07 AM, jrc wrote:
Actually, we did it for the TMM replica by the rather unscientific
method of averaging the allometric lengths of the humerus and r/u,
which gave us a number on the approximate order of 2.05. One of
the reasons that we've continually reiterated that that replica is
intended for viewing, not scientific research. So, no -- it wasn't
isometric, though 2.05 is within 5%. The Qn torso depth ratio is
different -- it is controlled by the dp ratio due to the precise
relationship between the dp crest and the coracoid flange.
Remember that with the exclusion of the wing, I was the one who
generated the long bone dimensions used to construct the missing
bits of the TMM replica, so whether they're right or wrong -- I
know exactly how they were developed.
----- Original Message ----- From: "David Peters" <firstname.lastname@example.org
I'll bet you a beer determining torso length in Q. northropi from
Q. sp. is essentially isometric, multiplying within 5% of
exactly isometric. Which is negligible.