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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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