[PSUBS-MAILIST] Electircal System

Tue Feb 25 13:56:55 EST 2014

Brian, I guess you could put an extra ballast tank in at the neck portion where the sphere
joins the concrete ballast tank section if it ends up too heavy at the front end.
That will feel like progress when the hemis arrive. Hank has made a spherical submersible,
he may have some good advice.
Alan

________________________________
 From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, February 26, 2014 3:57 AM
Subject: Re: [PSUBS-MAILIST] Electircal System

Don't mind questions, this happens to be my favorite subject !  I have a trim tank ( hard ballast) up front.  At my present calculations I think I'm a little heavy by about 200 pound. But we'll see.  If worst comes to worst I'll have to add some synatic foam.  I'll have to play with the balance I'm sure I don't think it will be an insurmountable problem.

My two hemispheres should be here today or tomorrow !    All the way from Texas.

Brian

--- alanlindsayjames at yahoo.com wrote:

From: Alan James <alanlindsayjames at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Mon, 24 Feb 2014 23:57:51 -0800 (PST)

Hi Brian,
if you have that large 60"cylinder off the end of your ballast tank, & it has to weigh as 
much as the water it displaces to submerge, won't it be tipping the rest of the submarine up
while on the surface. It seems like it needs more ballast under it. Unless you have some sort
of hefty weight transference system. Hope you don't mind my comments.
Alan

________________________________
 From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Tuesday, February 25, 2014 6:11 PM
Subject: Re: [PSUBS-MAILIST] Electircal System

No, I need a big motor ( actually I will have two 18 hp motors) because I intend on traveling over to the Channel Island for some commercial fishing (15 miles).  Rather than just a hobby I'm planning on using the sub for a practical purpose.  Since I've ruled out the need for a support vessel this sub will have to make it on it's own.  If you notice the outlet for the escaping water is four 2" openings on the very bottom of the sub which will prevent any air from escaping.
Brian 

--- alanlindsayjames at yahoo.com wrote:

From: Alan James <alanlindsayjames at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Mon, 24 Feb 2014 20:34:29 -0800 (PST)

So the 60" sphere is why you need a big motor!
Will anyone fit in the tube compartment once you put in reinforcing rings or is that
for other equipment?
I noticed there are only one set of ballast valves either side & are wondering if there is 
the potential for the sphere section to descend first & a bubble to be trapped in the back section.
I remember seeing a submarine stuck nose down that had to be pulled out of the water because
of that reason & also probably because any further air to correct it went straight out the ballast water inlet.
Hope that makes sense. Sorry about all the questions, I'm intrigued with the design.
Alan

________________________________
 From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Tuesday, February 25, 2014 4:40 PM
Subject: Re: [PSUBS-MAILIST] Electircal System

I need to remove that diesel motor from my page ( it went to the scrap yard)  I have a 60 dia Sphere attached to a 26" diameter tube x 8' long which will ride in the trough of my ferro structure.  Conning tower will be at top of sphere. The thing will probably be around 6 tons ( dry weight) by the time I'm done with it.  I'm just going to start off with battery power but I fully intend to put a 28kW DC diesel generator in ( I have a space reserved !)  but that may have to wait till next year.  

I was going to have different configuration but with the conical section that was necessary the length became too long so I have opted for a sphere.   

Brian 

--- alanlindsayjames at yahoo.com wrote:

From: Alan James <alanlindsayjames at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Mon, 24 Feb 2014 19:28:11 -0800 (PST)

Hi Brian,
looked at your project page & am a bit confused.
Are you still using the diesel motor? & is the electric motor going in the hull & turning the 
propeller shaft of the diesel motor?
Also does the concrete exostructure incorporate ballast tanks or are they going to be attached 
to it? What are the dimensions of the pressure hull.
Regards Alan

________________________________
 From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Tuesday, February 25, 2014 4:01 PM
Subject: Re: [PSUBS-MAILIST] Electircal System

Lower RPM and a lot of start up torque.   

This page has some additional motors with other voltages:

http://www.thunderstruck-ev.com/hpevs-ac12-motor-conversion-kit-en-2-3-4.html

Brian

--- vbra676539 at aol.com wrote:

From: vbra676539 at aol.com
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Mon, 24 Feb 2014 21:44:38 -0500 (EST)

Why such low voltage on a motor this size? Those kinds of amps are going to take weld cables to manage. 

Vance

-----Original Message-----
From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Mon, Feb 24, 2014 9:41 pm
Subject: Re: [PSUBS-MAILIST] Electircal System

Actually this one might be better, lower RPM

--- vbra676539 at aol.com wrote:

From: vbra676539 at aol.com
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Mon, 24 Feb 2014 06:49:15 -0500 (EST)

Sounds good.

-----Original Message-----
From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Mon, Feb 24, 2014 12:35 am
Subject: Re: [PSUBS-MAILIST] Electircal System

Think I may have found a motor with an rpm curve that could fit the bill !   Going to talk to the golf cart folks tomorrow !

Brian

--- vbra676539 at aol.com wrote:

From: vbra676539 at aol.com
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Sat, 22 Feb 2014 13:37:45 -0500 (EST)

Well, that ought to give you something to ponder.

-----Original Message-----
From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Sat, Feb 22, 2014 1:15 pm
Subject: Re: [PSUBS-MAILIST] Electircal System

Cool,I know anything above 36 Volts can be problematic as far as getting accidently zapped.  But with the controllers they have now I could run a 48 volt AC induction motor from a DC power source.  That would be nice as far as smooth control capability and also I could run the motors in mineral oil and would not have to worry about any brushes.  However the rpm may be a problem unless I have some type of gear reduction.

Brian 

--- vbra676539 at aol.com wrote:

From: vbra676539 at aol.com
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] Electircal System
Date: Sat, 22 Feb 2014 11:29:06 -0500 (EST)

Brian, 

Delta did 6000+ dives with a hull grounded 48 volt system without problem. Just saying.....

Vance

-----Original Message-----
From: Brian Cox <brian at ojaivalleybeefarm.com>
To: Personal_Submersibles <Personal_Submersibles at psubs.org>
Sent: Sat, Feb 22, 2014 11:08 am
Subject: [PSUBS-MAILIST] Electircal System

Hi All,
            I'm considering a 48 volt system for my motors, is that too high of voltage as far as safety goes for a sub ?

Brian
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