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Re: Ad Explanorum Origam



if, as many people have suggested, the structures of Longisqama are a
framework and have no surface tissue they would have the aerodynamics of
knitting needles (providing they aren't fern fronds....).

What reconstruction would you want them to do calcs off?  The flanges
with a heavy solid border reconstruction?  The knitting needles?  The
fern fronds?

-Betty
(who bets the fern fronds would have better aerodynamic qualities than
the knitting needles)

"Jaime A. Headden" wrote:

>   One thing about *Longisquama* that apparently has
> not been looked at is the capability of the
> structures, if indeed they are homogenous, to actually
> keep the animal in the air, hypothesizing they could
> increase ventral air pressure in the first place. All
> gliding animals (kuehneosaurs, *Draco*, flying fish,
> flying snakes, gliding rodents and flying lemurs, and
> bats) have a continuous dermal "sail", rather than a
> structure composed of multiple flaps or "fronds";
> birds do, but these very significantly overlap even in
> full extension except at the tips of wings and tails,
> where the whole still creates air pressure effective
> enough to keep the animal _up_. Could any of you bird
> or aeronautic specialist out there do some quickie
> calcs for us?

-- 
Flying Goat Graphics
http://www.flyinggoat.com
(Society of Vertebrate Paleontology member)
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