[PSUBS-MAILIST] Vacuum grease

[James Frankland via Personal_Submersibles]

Hi alec,
That's great, many thanks.  No rush with the sheet, I am not starting my
new sub until the new workshop is complete.

I'll check out facebook.
Thanks
James

On 26 July 2016 at 14:37, Private via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Actually I don't have s single photo, but Brian put a couple on FB. By all
> means I'm happy to share the spreadsheet, but let me do a little cleanup
> first! I have to work on my material a bit and will use the convention
> presentation as a motivator to do so. But today is a travel day, I'll be
> driving there.
>
> Best,
>
> Alec
>
> On Jul 26, 2016, at 9:19 AM, James Frankland via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi Alec,
>
> Thanks for the update.   Interesting report.  There probably isn't a
> single psubber who has had a perfect first launch and like you say,
> hopefully it should be relatively easy to correct.  Lots of positives and
> at least you managed to avert a flood, that would be a proper nightmare.
> Have you got any pics?  Or are you saving them for the convention?
> Actually, are the talks going to be streamed like last year?  Or at
> least recorded?  I would like to watch them as always.  Also, the stability
> spreadsheet you mentioned.  Is that a public thing?  or your own?  Could I
> have a copy?  I will need something like that for my new boat...
>
> Regards
> James
>
> On 26 July 2016 at 13:52, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi James,
>>
>> We did the first test yesterday and I'm afraid have some work yet to do.
>> The good news is the trailer and boat systems seem to be good, and the
>> cabin and battery pods were watertight. The bad is she had a static
>> stability issue and will require considerable additional ballast weight. I
>> have a stability spreadsheet, which indicated a righting moment of 11200
>> in-lbs in standard configuration. However, when I factor in a few very
>> normal circumstances (no crewman lying on the floor, captain standing up,
>> hatch raised because its open) it drops to a puny 460 in-lbs. That was a
>> bad design oversight on my part but should be easy to correct with
>> additional ballast. I'll need to add buoyancy as well, which is more
>> challenging, in order for the sub to remain neutrally buoyant when
>> submerged. So, not ready yet and I'm afraid I'll be sub-less at the
>> convention, but at least my presentation should be a bit more interesting.
>> Lesson learned... when launching a sub for the first time, do so with the
>> hatch sealed and nobody inside. I launched as if it were an already proven
>> sub, and things got rather too exciting because she turned out to be woozy
>> and I was standing in the hatch. We managed to avert flooding, but it was
>> way too close for comfort.
>>
>>
>> Best,
>>
>> Alec
>>
>> On Mon, Jul 25, 2016 at 6:08 AM, James Frankland via
>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>
>>> hows it going with you new boat Alec?    Must be nearly ready now?
>>>
>>> On 22 July 2016 at 23:57, Alec Smyth via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> Thanks Hank, but I was able to finish all the viewports with what I had
>>>> on hand. All good!
>>>>
>>>> Best,
>>>>
>>>> Alec
>>>>
>>>> On Fri, Jul 22, 2016 at 4:31 PM, hank pronk via Personal_Submersibles <
>>>> personal_submersibles at psubs.org> wrote:
>>>>
>>>>> Alec,
>>>>> If you need Dow Corning Vacuum Grease, you can get it from Amazon for
>>>>> much cheaper.  Also you can get it real quick
>>>>> Hank
>>>>>
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