[PSUBS-MAILIST] Group Help Request

Go in a big shop for garden and flours. 
Looking fo the right size flower -pod made from platic. 
The rest is a foam and filler job for the positive plug. 

http://www.hagebau.de/Garten-und-Freizeit/Pflanzen/Pflanzkaesten-und-kuebel/Blumentopf-Fiore-Alessia-terrakotta--22-cm/AN4008419055624-sh3391917sp4008419055624
 
vbr Carsten

"Joe Perkel" <josephperkel at yahoo.com> schrieb:
> How can a home builder maintain that contour 360 Deg out of "X" material?
> 
> Joe
> 
> Sent from my overpriced 
> iPhone
> 
> On Oct 28, 2013, at 2:57 AM, Marc de Piolenc <piolenc at archivale.com> wrote:
> 
> > Quick clarification: a properly contoured Kort nozzle, MARRIED TO A MATCHING PROPELLER, will increase static and low-speed thrust. Of course it won't increase power, since that comes from your motor. If you just put a shroud around your existing prop, you will be disappointed, and a shroud that doesn't do the job is overpriced unless it's free! Key ingredients for success:
> > 
> > Prop matched to the shroud
> > Shroud matched to the speed and thrust requirement of the vehicle
> > Motor matched to the resulting prop
> > 
> > Marc
> > 
> > On 10/28/2013 8:33 AM, Jon Wallace wrote:
> >> 
> >> What is the cost of having a true Kort nozzle machined by a CNC? I think
> >> a 30% improvement in thrust for $30 would be great but I suspect
> >> machining a Kort is going to equate to many hundreds of dollars, if not
> >> reaching beyond a thousand. When I look at the Snoopy underwater videos
> >> it is difficult to imagine a kort nozzle really making any difference in
> >> the operational experience given that the motors are operating very
> >> slowly and pushing Snoopy around at about 2 knots (estimated). The
> >> props are designed for power, but that's what we want underwater. True,
> >> a kort nozzle would increase that power but what is the return on the
> >> cost? In other words, on a road with a speed limit of 30mph and no
> >> passing zones it doesn't matter whether you have a 1.6 liter or 5.4
> >> liter engine under the hood does it?
> > -- 
> > Archivale catalog: http://www.archivale.com/catalog
> > Polymath weblog: http://www.archivale.com/weblog
> > Translations (ProZ profile): http://www.proz.com/profile/639380
> > Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
> > Ducted fans: http://massflow.archivale.com/
> > _______________________________________________
> > Personal_Submersibles mailing list
> > Personal_Submersibles at psubs.org
> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
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> 
 

-- 

Carsten Standfuß
Dipl.Ing.Schiffbau @ Meerestechnik
Heinrich Reck Str.12A
18211 Admannshagen

0172 8464 420
WWW.Euronaut.org
Carsten at euronaut.org
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