Nozzles?

[HUNTR2@aol.com]

In a message dated 8/7/99 3:20:52 PM Pacific Daylight Time, 
paul_suds@hotmail.com writes:

<< I intend on keeping it to a minimal volume to minimize air volume, 
 mass, ballast, increase strength, etc, etc. I've already found some DC 
 motors, 96-140vdc, 15 HP units, which should really make the unit fly. 
 Unfortunately, I'm looking at controllers, relays, etc, which you really 
 need for high output units like this, ie, not your typical trolling motor. 
 With those high voltages and currents, I can't afford a short. Also I'm 
 looking at a Kort nozzle configuration for the inlet. I haven't figured out 
 all the physics yet for an optimum high velocity, low pressure imbedded 
 nozzle, so I'm still doing the research on this. If I can find some good 
 engineering calcs on Kort nozzles, I'll be happy. >>

Have you thought about a jet ski nozzle?   They might work fine for the high 
output you want.  But I also remember someone a year or so ago saying that 
they work on very high rpm and don't work at depth because.... something 
about air bubbles in the water under the jetski make them really kick the 
power out... and there are no air bubbles at depth.  As I recall, this person 
was speaking from emperical experience.   (Are you out there yet)
Gene Seus