Human Ornithopter Problem?

On 6/26/07, Xenophile wrote:
(...)
> Now, I don't doubt in the least that a lean, strong person in a 1 bar,
> 1/6 G setting could flap properly-designed wings fast enough and hard
> enough to generate lift. I don't have any problem with that. What
> bothers me is that every artist's conception I see of this has the
> wings at about shoulder level, while the human center of gravity is
> between the navel and groin. So the flapping athlete will only be able
> to fly about with the body in a vertical orientation. And forget about
> going all horizontal and soaring. Nope, this will be more like
> treading water, only with big things tied to your arms. Not quite the
> graceful, eagle-like image we are used to seeing.
(...)

I remember an exception to this "angel" design: in an Asimov short
story, the fly suit made the person wearing it resemble more some kind
of aquatic animal (with the big flippers of a whale, maybe) than a
bird/angel. But then that was for zero-g flight in the axis volume of
a rotating space colony, not a partial Moon gravity.