[PSUBS-MAILIST] Group Help Request

Mon Oct 28 15:19:00 EDT 2013

 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 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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