[PSUBS-MAILIST] Group Help Request

Alec Smyth alecsmyth at gmail.com
Mon Oct 28 14:20:07 EDT 2013 

Yep. Also, I would avoid the set screw idea. Just make a cylinder that hugs
the motor can but has a lengthwise slit, and screws to close that gap. The
set screws will initiate a nuisance rust point on the can, and a closed
cylinder will hold tighter in any case.



On Mon, Oct 28, 2013 at 2:10 PM, Joe Perkel <josephperkel at yahoo.com> wrote:

> 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? Dontwant 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/
>> >> _______________________________________________
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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:
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