Jim,
My hands are full with sonar at present, but I am going to need tons of assist later on. Thank you for the offer of assistance as I am going to need it.
David Bartsch
From: kocpnt@tds.net
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Looking for electric motors.
Date: Fri, 2 May 2008 05:34:26 -0500
Hi David,
That sounds like an interesting design.
If there is any way I can help, just let me know.
Best Regards,
Jim K
----- Original Message -----
Sent: Thursday, May 01, 2008 11:06 PM
Subject: RE: [PSUBS-MAILIST] Looking for electric motors.
Jim,
My design encloses a 500 gallon butane tank such as would produce an extreme tear drop design based closely on the Skipjack class fast attack submarine of the the late 50's early 60's.
This would require a single drive shaft at the centerline of this boat. The reduction gear I intend to utilize has a 10-1 reduction ratio. With the seven bladed prop already produced, this would have a maximum shaft RPM of 174 with the 1 hp DC motor max RPM of 1750. With this prop being some 15" in diameter and the hull so streamlined, this baby should fly!
Ribbing installed in sections should enable fair depth capability and with pulse width modulation, a reasonable range of operation should be achieved as well. This project is not soon to see water as I have two young boys that need to become self reliant first (the youngest being 7)
The projected maximum depth for this boat should be close to 500'.
David Bartsch
From: kocpnt@tds.net
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Looking for electric motors.
Date: Thu, 1 May 2008 22:38:50 -0500
Hi David,
I'll be happy to help, however the seals that I am using and familiar with are not suitable for high speed shafts.
I will help if I can.
Best Regards,
Jim K
----- Original Message -----
Sent: Thursday, May 01, 2008 8:07 PM
Subject: RE: [PSUBS-MAILIST] Looking for electric motors.
Jim,
I plan a single 1" drive shaft...I might need some advice on seals later...
David Bartsch
From: kocpnt@tds.net
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Looking for electric motors.
Date: Thu, 1 May 2008 14:26:51 -0500
Hi Again Frank,
As you know, I'm a rotating shaft thru hull kind of guy but may still have an idea for you that will not use electrical power or be slow. If you used two similarly sized dual acting hydraulic cylinders, one as an actuator and one inside as a master cylinder you could have direct immediate response and no power drain.
Hope it helps!
Best Regards,
Jim K
----- Original Message -----
Sent: Thursday, May 01, 2008 12:34 PM
Subject: Re: [PSUBS-MAILIST] Looking for electric motors.
Hi Jim. Thanks for the compliments. I'm getting ready to do the power thing for the dive planes, and want to check out using electric before I commit to air or hydraulic. I have a grainger's book, and there are lots of motors that would work, but ya, I'd have to build enclosures. I'll probably stay with hydraulics, but want to research this possibility first. Moving the dive planes with an electric toggle switch would make it more responsive to descend/ascend via the planes, but suck up a lot of electrical power.
If I use a small hydraulic pump, the inside controls would be basically the same as electric, but I was really planning on using a hand pump, where quick changes in dive plane position wouldn't be possible, but uses no battery power. Still looking for the right compromise of power usage and performance. I have limited space for batteries, and am trying to maximize the 10 battery "bank" so I don't waste it on unnecessary tasks. Anybody out there got a small nuke plant they're not using ? Frank D.
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Back to work after baby– how do you know when you’re ready?
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