[PSUBS-MAILIST] Group Help Request

Alan alanlindsayjames at yahoo.com
Mon Oct 28 17:00:40 EDT 2013 

Joe,
I designed mine as accurately as possible to dimensions I found
on the net. And the pots were perfect in slope to what I needed.
All you have to do is take your propeller to a plant shop & tell
them you are wanting to size it for a kort nozzle for a submarine.
Alan

Sent from my iPad

On 29/10/2013, at 9:08 AM, Joe Perkel <josephperkel at yahoo.com> wrote:

> Yes Carsten, very hopeful moneywise!
>  
> But, I wonder if this is a shrouded/ducted prop as opposed to an accurate Kort Nozzle. But, perhaps it may not matter in the end if all one wants is a prop guard.
>  
> I am going to see what different configurations of the Kort Nozzle bring in terms of material cost.
>  
> Joe
> 
> From: "MerlinSub at t-online.de" <MerlinSub at t-online.de>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Monday, October 28, 2013 3:19 PM
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> 
>  http://www.aliexpress.com/item/Brand-New-300W-Motor-Powered-Sea-Scooter-Underwater-propeller-Diving-Assistant/336556698.html
> 
> Inside Diameter of the Kortnozzle is 250mm or 9,84 something inch. 
> 
> Protection grid forward and aft are just fix with clips. 
> 
> vbr Carsten
> 
> 
> 
> Alec,
> 
> Don't count it out just yet, I went to Gavin via the link you provided and had an epiphany! Note well the inside surface vs the outside surface of that Kort nozzle!!
> 
> The model I quoted was solid material!! 
> 
> I know what I'm doing tonight!
> 
> Joe
> 
> Sent from Yahoo! Mail for iPad
> 
> From: Alec Smyth <alecsmyth at gmail.com>; 
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>; 
> Subject: Re: [PSUBS-MAILIST] Group Help Request 
> Sent: Mon, Oct 28, 2013 5:28:50 PM 
> 
> Sounds like David has just saved me the work of taking a 101 apart and measuring it, thanks! As for the 101 prop size, it's 11" diameter. Before you go off spending $760 on a nozzle, you might want to look up these folks: http://www.gavinscooters.com/ I can't help notice Emile used a Gavin, and it looks like Gavin Scooters, Inc. is right in your neighborhood.
> 
> Best,
> 
> Alec
> 
> 
> On Mon, Oct 28, 2013 at 12:43 PM, Joe Perkel <josephperkel at yahoo.com> wrote:
> David,
>  
> Thats spectacular, thanks!
>  
> Joe
> 
> From: David Colombo <seaquestor at gmail.com>
> 
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Monday, October 28, 2013 12:12 PM
> 
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> 
> Hey Joe,
> I will send you my cad files on the Minkota 101 Saltwater. I have measured my new 101s and weed 2 prop.  I have also worked out the Marin 37 Kort nozzel design and attachment to the thruster for use on the SeaQuestor project. I will be most likely sending it to my fiberglass fabricator who will cut the assembly in foam  on their 5 axis cnc, ready for a fiberglass overlay.
> 
> 
> Best Regards,
> David Colombo
> 
> 804 College Ave
> Santa Rosa, CA. 95404
> (707) 536-1424
> http://www.seaquestor.com/
> 
> 
> 
> On Mon, Oct 28, 2013 at 8:03 AM, <jimtoddpsub at aol.com> wrote:
> Joe,
> Since you asked: http://en.wikipedia.org/wiki/Cast_urethanes
> Jim
> -----Original Message-----
> From: Joe Perkel <josephperkel at yahoo.com>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Sent: Mon, Oct 28, 2013 9:54 am
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> 
> Ok gentlemen first round of quotes for a Marin 19A Nozzle only in ABS plastic (White) for a 6" prop and not accounting for prop clearance is $760. This is using FDM process.
>  
> Same nozzle in cast urethane,.. $ 3,700,.. what is cast urethane? Dont want it anyway!!!
>  
> I need to know the exact diameter of a Weedless wedge 2 prop for a 4" motor in order to get the quote exact.
>  
> Joe
> 
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Monday, October 28, 2013 10:28 AM
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> 
> Scott,
> I use weights from a weight lifting set, the steel ones.  They could go outside on a peg so to speak.  The only problem is you want them at the bottom of the sub.  That means hauling the sub unless you want to get wet.  Maybe a slide system.    I thought the same thing to put the air outside, that would kill my sleek and slippery-ness.  :-)
> Hank
> 
> From: swaters <swaters at waters-ks.com>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Monday, October 28, 2013 7:46:30 AM
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> Hatch closure from both sides deffenetly a good one. I would say adjustable exterior weights. I hate the idea on chucking weights on the floor and then sitting on them. I am torn between that and moving the hp air tanks to the exterior to allow alot more room on the inside.
> Thanks,
> Scott Waters
> 
> 
> 
> 
> 
> Sent from my U.S. Cellular© Smartphone
> hank pronk <hanker_20032000 at yahoo.ca> wrote:
> Joe,
> Why don't you take a vote on what the best improvement would be for a k sub or alike.  My vote would be for a hatch closure from both sides.
> Hank
> 
> From: Joe Perkel <josephperkel at yahoo.com>
> To: "personal_submersibles at psubs.org" <personal_submersibles at psubs.org> 
> Sent: Monday, October 28, 2013 5:41:42 AM
> Subject: Re: [PSUBS-MAILIST] Group Help Request
> I just love the world in which we live! Look what I found while waiting to take my daughter to school,.. http://www.quickparts.com/QuickQuote.aspx
> 
> Isn't that just the coolest thing! The Star Trek synthesizer in the real world.
> 
> Joe
> 
> Sent from Yahoo! Mail for iPad
> From: Marc de Piolenc <piolenc at archivale.com>; To: <personal_submersibles at psubs.org>; Subject: Re: [PSUBS-MAILIST] Group Help Request Sent: Mon, Oct 28, 2013 10:46:58 AM
> Never thought much about doing it at small scale.
> 
> I suppose I would set up something like a wood lathe or a potter's wheel 
> and work in some very soft material like low-density foam. Once I had 
> the shape that I wanted, I suppose one could pour a mold around the 
> master, melt or dissolve out the pattern and cast the final part in some 
> suitable plastic, or even in aluminum if you were ambitious.
> 
> 3D printing seems like the ultimate way to do it, though - the accuracy 
> available is already better than what we would need, and if the inital 
> results are not perfect, making changes and printing out another 
> prototype is very quick.
> 
> Marc
> 
> On 10/28/2013 6:13 PM, Joe Perkel wrote:
> > 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
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> >
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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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