Re: Underwater questions [ot]

Excerpts from mail: 3-Nov-99 Re: Underwater questions [ot] by Beth
Fulton@marine.csiro 
>  
> >Thus airplanes and submersibles are fundamentally different, and I
doubt
> >you could make a very effective vehicle that operated both in the air
> >and the water unless you've got exotic technology (like anti-grav).
>  
> Actually I was thinking the shapes of animals that work well in both -
I'm
> definitely not an engineer and thus must rely on what's closer to
home,
> thus I was very impressed to see that the Japanese engineers have
finally
> decided to trial subs that act (move) like fish ;)

What animals work well in both air and water?  Water and land, sure; but
air and water?
>  
> >Yes, I'm a mechanical engineering student; no, I don't like fluid
> >mechanics at all. :) 
>  
> It has its moments ;)
>  
A few.	Control systems are much more fun (feedback! feedforward!
lag-lead! PID! state-space!  woo hoo! :P