[PSUBS-MAILIST] Pressure proof motor

[Tim Novak via Personal_Submersibles]

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
>>
>>
>> Sent from Yahoo Mail on Android
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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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