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Re: FOUR, THREE, TWO, ONE . . . PTEROSAURS HAVE LIFT OFF!
----- Original Message -----
From: "David Peters" <davidpeters@att.net>
To: "jrc" <jrccea@bellsouth.net>
Cc: <dinosaur@usc.edu>
Sent: Friday, January 09, 2009 10:18 AM
Subject: Re: FOUR, THREE, TWO, ONE . . . PTEROSAURS HAVE LIFT OFF!
The point is, the wingfinger has to go from the vertical plane at launch
and just afterwards (during the squash and stretch phases), to a series
of oscillating planes averaging horizontal (aka flapping).
Yes. Doesn't present any problems during the launch phase. The unfolding
actually helps. One of those things where everything is working
synergistically (is that a word?).
I hope your pterosaur doesn't attempt a leap with widespread (in anterior
view) metacarpi!
Not until above brush height. The whole process including unfolding happens
with appropriate phasing. Low vegetation up to about wrist height is not an
issue. Trees would not be early in the launch cycle, but would become an
issue during the latter half of the first upstroke (same problem as
attempting cruise flight within a forest :-).
In profile view, the process doesn't bear much resemblance to the locus of
the top end of a vaulting pole during a pole vault.
JimC
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