Vance, what was it they'd done to those Minnkotas again? I remember they'd
replaced the lip seals on the shaft, but was it with ceramic seals? Because if
they go to 1,200 feet, I'm interested!
I'm been spending way too much time trying to source ceramic seals. There is a
ubiquitous and cheap seal from John Crane called a Type 21, which in the MSC
catalog is listed as "650 psi balanced / 250 psi unbalanced". Now, all my
research so far indicates that whether a mechanical seal is balanced or not
depends on the shape of the seal, and they offer only one shape, so I don't know
what MSC is talking about.
John Crane claims only the 250 psi figure, and their seals for 500 psi cost
about 20 times as much.
thanks,
Alec
________________________________
From: owner-personal_submersibles@psubs.org on behalf of Joseph Perkel
Sent: Thu 3/8/2007 9:05 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Great link page
Vance,
The Minn Kotas are impressive!...I've seen enough now to stop worrying about
thrusters.
Nice photos of PC 1401. Of real interest to me are the saddle tanks (appears to
be welded sheet metal), and the forward view port.
From what I can see so far, for my boat, the fore and aft MBT's along with the
fairings, can be standard mold / plug / glass construction. But the saddle tanks
have a shape more conducive to sheet over frames.
So my question to you is, what gauge sheet do you suppose this is, and what
should the interior surfaces be coated with? Once sealed, these would not be
opened again.
Joe
________________________________
From: vbra676539@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Great link page
Date: Wed, 07 Mar 2007 15:36:12 -0500
Re: 1401. Do you guys remember the discussion we had about Minn-Kota
thrusters modified to sustain up to 1200 feet without compensation? Well, there
they are. Vance
-----Original Message-----
From: MerlinSub@t-online.de
To: personal_submersibles@psubs.org
Sent: Wed, 7 Mar 2007 3:28 PM
Subject: [PSUBS-MAILIST] Great link page
http://www.modell-u-boote.de/links/links_originale/links_originale.html
http://www.modell-u-boote.de/originale/perry_1401/perry.html
http://www.modell-u-boote.de/originale/marder/marder.html
http://www.modell-u-boote.de/originale/holland/holland.html
regards Carsten
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