[PSUBS-MAILIST] CAD for presentation

[Sean T. Stevenson via Personal_Submersibles]

Natural rubber, chloroprene rubber, or "rubber" (nitrile etc.)?

The Parker O-ring Handbook has a good material compatibility table.  Vaseline is a mixture of heavy hydrocarbon chains, longer than 25 or so.  The line item for "Hydrocarbons, Saturated" is probably the closest fit, for which Parker recommends their N0674 material (nitrile) in 70 durometer.  Thankfully, these are the most common O-rings you can find.

Sean


On June 9, 2016 2:36:08 PM MDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>Does anyone know if Vaseline will harm rubber O rings?
>
>Rick
>
>On Tue, Jun 7, 2016 at 9:00 AM, via Personal_Submersibles <
>personal_submersibles at psubs.org> wrote:
>
>> Rick,
>>
>> I never did pot my VHF antenna and it works great. I did however pot
>my
>> GPS and I just filled it with epoxy and it works great too.
>>
>> Thank you,
>> Scott Waters
>>
>> >  -------Original Message-------
>> >  From: Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org>
>> >  To: Personal Submersibles General Discussion <
>> personal_submersibles at psubs.org>
>> >  Subject: Re: [PSUBS-MAILIST] CAD for presentation
>> >  Sent: Jun 07 '16 13:05
>> >
>> >  I would like to find out from anyone who has an external VHF
>antenna
>> >  how they potted what looks like a filter at the base of the
>antenna.
>> >
>> >  Rick
>> >
>> >  On Sat, Jun 4, 2016 at 3:25 AM, Alec Smyth via
>Personal_Submersibles
>> >  <personal_submersibles at psubs.org> wrote:
>> >
>> >  > Hi everyone,
>> >  >
>> >  > I just got introduced to a free cloud CAD program by one of the
>SMEs
>> >  > who is volunteering on Shackleton. The UI is very similar to a
>> >  > simplified Autocad, it seems to share a lot of the same
>commands.
>> >  > I'm sure there are limitations, but this seems to have three
>major
>> >  > things going for it; it's not too hard, it allows online
>> >  > collaboration between multiple designers because its in the
>cloud,
>> >  > and its FREE.
>> >  >
>> >  > https://www.onshape.com/
>> >  >
>> >  > Best,
>> >  >
>> >  > Alec
>> >  >
>> >  > On Fri, May 27, 2016 at 10:23 PM, Michael Holt via
>> >  > Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> >  >
>> >  >> I have Delftship, a freebie but apparently comprehensive thing
>> >  >> intended for surface ship design. (It was originally called
>> >  >> Freeships, I think.) I have never been able to us it because
>the
>> >  >> manual is damn near incomprehensible (it doesn't use some of
>the
>> >  >> terminology I'm accustomed to seeing). If anyone can get it to
>> >  >> do something useful, send me a personal message!
>> >  >>
>> >  >> Mike
>> >  >>
>> >  >> ---
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>> >  >> https://www.avast.com/antivirus
>> >  >>
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>> >
>> >
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>
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