There's that coincidence factor again. Ever since I'd seen the line drawings of Holland's man-powered submersible the idea of a pedalled ambient has been percolating in my mind. It would dispense with a lot of the expense and bother associated with batteries and their charging equipment. Of course, you'd have to surface more often using all that oxygen, but that's what skin divers and dolphins do anyway. Please keep us informed.
--- On Thu, 12/30/10, David Bartsch <dbartsch2236@hotmail.com> wrote:
From: David Bartsch <dbartsch2236@hotmail.com>
Subject: RE: [PSUBS-MAILIST] counter rotational
To: personal_submersibles@psubs.org
Date: Thursday, December 30, 2010, 1:04 PM
I may make an ultimate exercise machine only in ambient form. I need a large (or perhaps two) propellors to be efficient. This could be the way to go. I'd use a bike with gearing selection. David Bartsch
Date: Thu, 30 Dec 2010 08:52:10 -0800 From: akula151@yahoo.com Subject: RE: [PSUBS-MAILIST] counter rotational To: personal_submersibles@psubs.org
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David,
It's amazing how much cross pollinization goes on with this website. Just recently I'd been considering a contra prop in a Kort nozzle. It's nice to have an idea validated, even by accident.
As for the gearing: I'd been thinking along the lines of the old hand cranked egg-beater where turning the crank handle produces rotation of the beater blades in opposite directions. FWIW
PR
--- On Thu, 12/30/10, David Bartsch <dbartsch2236@hotmail.com> wrote:
From: David Bartsch <dbartsch2236@hotmail.com>
Subject: RE: [PSUBS-MAILIST] counter rotational
To: personal_submersibles@psubs.org
Date: Thursday, December 30, 2010, 2:37 AM
Thanks gang, Torpedo use is definitely out. After a little thought I think the real problem when using such a drive on a submarine would be to be able to seal these two separate shafts from leakage from sea pressure. Still, placing two such props inside a kort nozzle could give some awesome results...I'll follow up on your provided references. David Bartsch
From: JimToddPsub@aol.com Date: Thu, 30 Dec 2010 02:08:21 -0500 Subject: Re: [PSUBS-MAILIST] counter rotational To: personal_submersibles@psubs.org
David, here are a couple of links re contra-rotating shafts.
-Jim
In a message dated 12/30/2010 12:03:38 A.M. Central Standard Time, dbartsch2236@hotmail.com writes:
Anyone have a clue as to how a single shaft dual rotating propeller gear box works? Drawings?
David Bartsch
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