Re: [PSUBS-MAILIST] hydrodynamics question

[Marcus Cole <marcus.cole@sympatico.ca>]

At 11:07 PM 5/17/2002 Friday, you wrote:
> Alec Smyth wrote:
> > 
> > My design has twin props astern, in tunnels fed by side-scoops (a la
> fighter
> > jet). I'm currently making the mold for the stern fairing, and
> I'm
> > contemplating the best size and shape for the scoops. Given that
> water is
> > essentially incompressible, am I correct to assume the frontal area
> of the
> > scoops should be the same as the area of the prop tunnels?
> Another
> > possibility would be to eliminate the scoops altogether and go with
> NACA
> > intakes or such. But the scoops are definitely sexier.
>
> Keep in mind that NACA intakes or scoops will ingest all sorts
> of floating stuff.  You're gonna have to find a way to screen
> them -- probably with bars parallel to the flow, because real
> screens would add significant drag.
>
> I have here a paper on pumpjet design.  It's from
> "Underwater
> Missle Propulsion," editied by Leornard Greiner and published
> in the 60s by Compass Publications.    If you're
> interested,
> I can try to have it scanned.
>
> I'd like to see pictures of what you're doing, too.
>
>
>
>
>
> Mike H. 

Hello Mike,  if you can scan the paper, can i get a copy of it also
please?  I think others
would also like to read them, but i can't talk for everyone.

Marcus