[PSUBS-MAILIST] Titan submersible missing at Titanic site
Marc de Piolenc via Personal_Submersibles
personal_submersibles at psubs.org
Sun Jun 25 21:14:00 EDT 2023
If it's the guy I'm thinking of, the sub was made of reinforced
concrete, not ferrocement.
Marc
On 6/25/2023 11:07 PM, Alec Smyth via Personal_Submersibles wrote:
> There's an interesting story about cement subs, which I will tell to
> the best of my recollection. In the early years we had a PSUBS member
> whose name I forget, I believe Swiss or Austrian, who had built a
> ferrocement sub that he kept at a mooring in a Swiss lake. The sub was
> successful, he dived it for years. But eventually he moved to Colombia
> due to marriage, and scuttled the sub in the lake, because the road he
> had used to take it there had been re-routed or modified somehow,
> leaving him without any way of getting it out. The sub became an
> attraction for local SCUBA divers.
>
> The second part of the story is that another PSUBS member, Ian
> Roxborough, hired the first guy to build him a large cement sub with
> the intention of making it an ocean going live-aboard. The project was
> done completely on the level, with notification to authorities and in
> a major port. This was no drug sub built in the jungle. It got to the
> point where the hull was complete, and I think they were about for the
> first launch. However, Colombia being plagued by drug subs, the
> authorities would not sign off on final paperwork or something (can't
> remember the exact glitch.) Ian had sunk a ton of funds into it, and
> the sub was probably perfectly good, but approval never came. I'm not
> sure what happened to the sub. But Ian is still very much active, so
> maybe can tell us. I'm not sure if he's on the email list. If you are,
> Ian, sorry for bringing up this rather painful memory!
>
> Best,
> Alec
>
> On Sun, Jun 25, 2023 at 8:35 AM Marc de Piolenc via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> That's it. I lost interest when I realized he had built a
> superstructure on a conventional pressure hull.
>
> Very sorry to hear about Brian Cox.
>
> Marc
>
> On 6/25/2023 6:11 PM, Jon Wallace via Personal_Submersibles wrote:
>> Marc, that was probably Brian Cox who passed away a year or so
>> ago. His pressure hull was steel but he did use ferrocement for
>> the superstructure.
>> http://www.subdb.info/cgi/database/showvessel/index.cgi?ID=1272980224&VN=Esmae&VT=1
>> <http://www.subdb.info/cgi/database/showvessel/index.cgi?ID=1272980224&VN=Esmae&VT=1>
>>
>> There are no standards for using ferrocement as a manned
>> submarine pressure hull and I think anyone attempting it would
>> find little support for the project given the Ocean Gate loss.
>>
>> Jon
>>
>>
>> On Sunday, June 25, 2023 at 04:09:00 AM EDT, Marc de Piolenc via
>> Personal_Submersibles <personal_submersibles at psubs.org>
>> <mailto:personal_submersibles at psubs.org> wrote:
>>
>>
>> I know. I fell in love with FC for yachts, which made me wonder how
>> useful it would be for pressure hulls... Turns out there is a 2010
>> exchange of messages in my archive with somebody on this list who
>> built
>> in FC, Brian Cox. Is he still there?
>>
>> Marc
>>
>> On 6/24/2023 8:27 PM, Bernie Hellstrom via Personal_Submersibles
>> wrote:
>> > Many boat hulls were made with FC. Even the landing barges in
>> the ww2 , to make piers to in load ships!
>> >
>> > Sent from my iPhone
>> >
>>
>>
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