[PSUBS-MAILIST] Yet another compensator method

[Alec Smyth via Personal_Submersibles]

Looks good to me, but why have an air bubble? I always tried like crazy to
eliminate it, since that is what expands or contracts most.

Thanks,
Alec

On Mon, Jul 6, 2020 at 10:00 AM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> James, that looks great-the air bubble is good also.
> Hank
>
> On Monday, July 6, 2020, 7:31:46 AM MDT, James Frankland via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi All
>
> Getting Jodie B ready for diving in the next week or so.
> I have changed the motor compensator yet again as the last enclosed one
> didnt really have a proper flexible part and I think the oil expanded a bit
> over time and leaked out through the seals.  Just a tiny bit, but enough to
> put some air back in the pipe.
>
> Anyway, the new method is simply a tube with belows.  These are from a
> toilet flush and have been sitting full of oil for a couple of weeks to see
> if anything happens.  They seem good, so i have installed them. The motor
> is completely filled with oil and the bellows have a small amount of air.
> They compress easily, so should provide pressure compensation while also
> allowing the oil to expand if required.
>
> The bellows will be covered with an open ended tube for protection.  Just
> got to make a strap for those.
>
> Any comments?
> Thanks
> James
>
> [image: 20200704_142240.jpg]
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