[PSUBS-MAILIST] Group Help Request

Joe Perkel josephperkel at yahoo.com
Mon Oct 28 16:08:48 EDT 2013 

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© Smartphonehank 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
>>>>> 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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>>>> -- 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 listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
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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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