[PSUBS-MAILIST] Group Help Request
MerlinSub at t-online.de
Mon Oct 28 17:40:00 EDT 2013
Another german solution:
Reinhard from Berlin makes his from stainless steel beer drums.
https://www.google.de/search?q=bier+fass&tbm=isch&tbo=u&source=univ&sa=X&ei=vtZuUpdjxZC0BruFgMAK&ved=0CEoQsAQ&biw=1573&bih=861#q=bierfass+edelstahl&tbm=isch
http://www.seppeler.de/index.php?id=2135
"Joe Perkel" <josephperkel at yahoo.com> schrieb:
Well it would seem that the Marin 19a for an 11" prop exceeds the
dimensional capability of the rapid prototype making this cost
prohibitive.
I will produce the CAD files anyway because the shape is dead on. So
they can then await an affordable process.
Joe
Sent from my overpriced
iPhone
On Oct 28, 2013, at 5:00 PM, Alan <alanlindsayjames at yahoo.com> wrote:
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
>> Ducted fans: http://massflow.archivale.com/
>> _______________________________________________
>> Personal_Submersibles mailing list
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>
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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
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Carsten at euronaut.org
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