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Re: Wing in ground effect and Oops (list version)



----- Original Message -----
From: James R. Cunningham <jrccea@bellsouth.net>
To: Martin Barnett <martin.barnett3@virgin.net>; <dinosaur@usc.edu>
Sent: Tuesday, November 02, 1999 9:34 PM
Subject: Re: Wing in ground effect and Oops


>
>
> Martin Barnett wrote:
>
> > >, what  I meant, though, was:  as running speed is increased, lift
> > increases to a certain degree but only behind the Centre of gravity, <
> >
> > Why does lift only increase behind the center of gravity when
> > running?  For animals,  just sweep the wings slightly forward if you
> > wish to increase lift in front of the cg.
> > you can shift the lift to pitch over backwards if you
> > wish.   However, since I'm not too partial to bipedal pterodactyls,
> > I'm not going to pursue that.
Firstly, I thought the hypothetical model was using the wing tips as a
stabiliser to the head?  If not then you're absolutely right, but if so you
lose your stabiliser bringing the wings forward. (still I'm sure there's a
dynamic compromise between the two if you really look for it)