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Re: semilunate carpal

And it would mean that the variable moment applied to the torso could be
additionally controlled by extending or retracting one arm more than the
other, and/or at different angles.

ptnorton@msn.com wrote:

>  it would have been advantageous for the creature to be able to
> control the length of the lever arm (and therefore the turning moment)
> by extending and retracting that aerodynamic surface.  In that
> scenario, a wrist that could be adducted ("folded sideways") would be
> advantageous in that it would allow the creature to maintain the
> aerodynamic surface roughly horizontal to the airflow as the elbow was
> drawn in towards the body. Hmmmm.... PTN