[PSUBS-MAILIST] Alec's new sub

Mon Jun 29 06:02:55 EDT 2015

Hi Alec,

New sub looks great.  With those ball floats at the back it reminded me of
"The Liberator" from an old BBC science fiction program called "Blakes 7".
I was a big fan when I was a kid.

https://contactinfinitefutures.files.wordpress.com/2012/06/the-liberator.jpg

On 29 June 2015 at 04:40, Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> That's great thanks Alec,
> I'll save that description with the dwg.
> Alan
>
>   ------------------------------
>  *From:* Private via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Monday, June 29, 2015 1:21 PM
>
> *Subject:* Re: [PSUBS-MAILIST] Alec's new sub
>
> Correct!
>
> The little O ring under the threaded contacts on the hull side has two
> purposes. It prevents water coming into the sub if you drop the thruster,
> but it also acts as a spring to maintain good electrical contact. When the
> thruster is off, the sub side contact sticks out very slightly above the
> rest of the penetrator, so when you draw the motor toward the sub the
> contact squeezes its O ring.
>
> The contacts on the sub side go through a nylon insert sealed with O rings
> and locked by a shoulder in the SS insert. On the thruster side the
> contacts and cables are potted, but because the thruster is oil filled the
> potting is not subject to any pressure.
>
> The bolt has a shaft seal that prevents it being pushed into the sub if
> you drop the thruster.
>
> The thrusters are fixed, not rotating. The benefit of this design is that
> there are neither cables nor tubes to sever - you just need to switch off
> power to the thruster before dropping it, and the dropping itself is just
> three or four turns of a bolt.
>
> Best,
>
> Alec
>
>
>
>
>
> On Jun 28, 2015, at 7:55 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> I think I understand it now.
> The 2 bolts are the electrical through hulls & you wind the
> central nut to push the unit off. The electrics would unplug in the
> process.
> Alan
>
>   ------------------------------
>  *From:* hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Monday, June 29, 2015 10:02 AM
> *Subject:* Re: [PSUBS-MAILIST] Alec's new sub
>
> Alec,
> Nice project, I like the trawl floats in the back, it is so different!
> The first thing that comes to mind when I see your new build is, Manatee.
> You sure have put in a lot of time on this.  I like the jettisoning
> system, it is the same idea as Gamma's tail, very simple and clean.  The
> bellows are very nice!
> Nice video, you have good control of the sub.
> Hank
> --------------------------------------------
> On Sat, 6/27/15, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Subject: [PSUBS-MAILIST] Alec's new sub
> To: "Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>
> Received: Saturday, June 27, 2015, 10:40 PM
>
> Hey everyone, I'm
> breaking cover with the project sub. It is in need of a
> name. If the pictures inspire any thoughts that are not
> rude, I'm all ears for suggested names!
> http://www.psubs.org/projects/1234567810/newsub/
>
>
> Best,
> Alec
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