[PSUBS-MAILIST] Pressure proof motor

[James Frankland via Personal_Submersibles]

Hey Alan,
I was looking at that exact motor!  Will be interesting to see how you get
on with it.  Take loads of pics for us if you can.

Regards
James

On Fri, 24 Nov 2023 at 12:38, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Tim,
> My air compensation system works so well I did not bother to follow up on
> that idea.  I need air compensation for the arm also, so one system takes
> care of both.
> Hank
>
> On Thursday, November 23, 2023 at 08:54:56 PM MST, Tim Novak via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hank, how did your pressure sealed motor with the magnetic coupling to the
> propellor work out?
> Tim
>
> On Thu, Nov 23, 2023 at 7:36 PM Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> I don't plan to prep the shaft surface at all. According to the Parker
> documentation, the seal will polish the shaft so that it improves with use.
> We shall see! We're planning to run extended tests in an instrumented
> pressure chamber. Eventually, of course, the shaft would wear out. But
> consider how many hours we put on our subs compared to the hours an avid
> fisherman would. At least on my part, I probably put as many hours on it in
> a year as a fisherman does in a day or two.
>
> :)
> Alec
>
> On Thu, Nov 23, 2023 at 8:44 PM Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Alec,
> I just had a heads up from Cliff on this.
> What sort of shaft preparation do you need?
> Also are the shafts likely to deteriorate causing an undetectable ingress
> of water.
> My thoughts are to keep the air compensation as we seem to be perfecting
> that. And with the over- air pressure any failure will be visible with air
> leaking out.
> Alan
>
>
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>
> On Fri, 24 Nov 2023 at 11:40 am, Alec Smyth via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
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