[PSUBS-MAILIST] Group Help Request
Marc de Piolenc
piolenc at archivale.com
Tue Oct 29 10:30:14 EDT 2013
Two suggestions have already been made, namely printing it in sections -
a common practice - and the woodlathe-master idea.
Marc
On 10/29/2013 8:54 PM, Joe Perkel wrote:
> Marc,
>
> What other build processes can you recommend? Intake diameter of nozzle exceeds capability of 3d process and cost issues.
>
> How do hovercraft builders (hobbyists) maintain an accurate profile on such large ducts?
>
> Joe
>
> Sent from my overpriced
> iPhone
>
> On Oct 29, 2013, at 7:59 AM, Marc de Piolenc <piolenc at archivale.com> wrote:
>
>> A Kort nozzle is a ducted propeller - known by the name of the inventor of that particular application.
>>
>> Marc
>>
>> On 10/29/2013 4:08 AM, Joe Perkel 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
>>> >> Ducted fans: http://massflow.archivale.com/
>>> >> _______________________________________________
>>> >> Personal_Submersibles mailing list
>>> >> Personal_Submersibles at psubs.org
>>> >>
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>> >
>>> > _______________________________________________
>>> > Personal_Submersibles mailing list
>>> > Personal_Submersibles at psubs.org
>>> >
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>> > -- 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
>>> _______________________________________________
>>> Personal_Submersibles mailing
>>> listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>>
>>>
>>> --
>>>
>>> Carsten Standfuß
>>> Dipl.Ing.Schiffbau @ Meerestechnik
>>> Heinrich Reck Str.12A
>>> 18211 Admannshagen
>>>
>>> 0172 8464 420
>>> WWW.Euronaut.org
>>> Carsten at euronaut.org
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org <mailto:Personal_Submersibles at psubs.org>
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>> --
>> 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
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
--
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/
More information about the Personal_Submersibles
mailing list