Alec,
Larger ball
with smaller holding frame with small sealed shaft through it. The ball
allowed rotation around and the shaft could be pulled in or pushed out.
The shaft was hollow with a gripper on one end and a squeeze handle on the end
inside the sub. While tested to 1000 fsw, max. barely functional depth was
400 fsw as you are fighting the water pressure wanting to push the rod back
into the boat. The water pressure also makes it difficult to rotate the
ball at 400 ft. This was the maximum functional depth for 1 atmos. iron
suit divers as they had to fight water pressure to move, quickly tiring at 4oo
ft. This is where Phil’s radical joints in the NuytSuit allowed going
to much greater depths. There is (or was) a great book on the subject by
Best Publishing, I believe entitled Iron Suits.
R/J2
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
It is the mark of an educated mind to be able to
entertain a thought without accepting it.
- Aristotle
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Smyth, Alec
Sent: Wednesday, February 14, 2007
11:19 AM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST]
concrete submarine yacht - building cost
I'm envisioning a ball valve in the open
position, with the ball modified to carry a shaft where the hole in the
ball would be. Is that basically what we're talking about?
:)
Alec
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of vbra676539@aol.com
Sent: Wednesday, February 14, 2007
11:00 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
concrete submarine yacht - building cost
Joe, Okay, if you insist. The mechanical thru-hull was a ball and
socket in the Nektons, tested for 1000 & 1100--although they got a pretty
severe case of arthritis beyond 500 or 600, according to those who knew. Vance
-----Original Message-----
From: joeperkel@hotmail.com
To: personal_submersibles@psubs.org
Sent: Wed, 14 Feb 2007 7:50 AM
Subject: Re: [PSUBS-MAILIST] concrete submarine yacht - building cost
Frank,
Even though I'm eliminating (two) rotating shafts by using fixed verticals, in
lieu of the standard K-350 set up. I will be retaining one rotating thru-hull
for the steering linkage, and another for the distress buoy release.
You would be correct in worrying about such penetrations for something
permanently docked but,what makes me feel better about this, is that Nekton (I
believe) uses rotating penetrations down to 2 K.
Vance may correct me on this but, I seem to remember reading that one of the
boats uses a manual manipulator through a standard gland nut packing
arrangement down to 2000'.
This makes me feel a whole lot better about these at my dinky depths.
Joe
>From: ShellyDalg@aol.com
>Reply-To: personal_submersibles@psubs.org
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] concrete submarine yacht - building cost
>Date: Tue, 13 Feb 2007 23:05:42 EST
>
>I'm not an expert plumber, but if a shaft seal fails while your sub
is
>docked, stored, or just parked at the dock....It sinks.
>I know the efficiency of a hydraulic system is somewhat less than a
direct
>drive, but a hydraulic through-hull fitting, with exterior hydraulic
>thrusters
>( available as off the shelf ) has a long history of reliability, is easy
>to
>maintain, and also easy to monitor/fix.
>And then we can consider the magnetic couplers available on hazardous
>pumping installations.
>There is virtually no leaks, no loss of power from conversion from
>electrical to mechanical to hydraulic to mechanical, and really no
>maintenance of the
>coupler.
>Here in California, there is a pumping
station supplying millions of >gallons
>of water into the California
aqueduct and it's been upgraded with magnetic
>couplers.
>The horsepower is very large, and the maintenance is quite low.
>Sorry for interrupting on this thread, but I just don't like the idea of
a
>spinning shaft under 200 feet of water.
>There's got to be a better way.......Frank D.
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