<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>I wonder how many watts those electromagnets take? I could do some tests to see what it would take to hold back the pressure of the shot.</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: personal_submersibles@psubs.org<BR>Subject: Re: [PSUBS-MAILIST] Drop weight design<BR>Date: Fri, 16 Sep 2016 15:12:10 -0400<BR><BR></DIV><FONT color="black" face="Arial, Helvetica, sans-serif" size="3"><DIV>Oops, that would be Nautile, the French sub.
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<DIV style="color: black; font-family: helvetica,arial; font-size: 10pt;">-----Original Message-----<BR>
From: via Personal_Submersibles <personal_submersibles@psubs.org><BR>
To: personal_submersibles <personal_submersibles@psubs.org><BR>
Sent: Fri, Sep 16, 2016 3:09 pm<BR>
Subject: Re: [PSUBS-MAILIST] Drop weight design<BR>
<BR>
<DIV>
<DIV><FONT color="black" face="Arial, Helvetica, sans-serif" size="3">The French didn't have anything to do with Trieste except for escort duty. It was built in Italy (in Trieste, don't you know) and belonged to Auguste Picard, who was Swiss. Then the US Navy. And yes, steel shot was used on all the bathyscaphs, including the French one, which was built later and called Archimede. And a few others, as well (like Nalutile). All of them had some variation of a ring electromagnet at the throat which served as a valve.
<DIV>Vance<BR>
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<DIV style="color: black; font-family: helvetica,arial; font-size: 10pt;">-----Original Message-----<BR>
From: Alec Smyth via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>
To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>
Sent: Fri, Sep 16, 2016 2:46 pm<BR>
Subject: Re: [PSUBS-MAILIST] Drop weight design<BR>
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<DIV dir="ltr">Actually they used steel shot rather than lead, and the flow was started or stopped via an electromagnet. A benefit of this was that you could easily shed increments of weight, and another was that if you lost power, the sub would drop it's ballast automatically (i.e. fail-safe).
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<DIV>Best,</DIV>
<DIV><BR>
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<DIV>Alec</DIV>
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<DIV>On Fri, Sep 16, 2016 at 8:48 AM, Jens Laland via Personal_Submersibles <SPAN dir="ltr"><<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>></SPAN> wrote:<BR>
<BLOCKQUOTE style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">Gentlemen,<BR>
<BR>
If I'm not wrong, I think the French used a whole lot of off-the-shelf<BR>
lead balls (as used in shotguns) in two individual pellet ballast<BR>
hoppers when they operated the "Trieste" back in the 50's, ref<BR>
<A href="https://upload.wikimedia.org/wikipedia/commons/3/31/Trieste_nh96807.svg">https://upload.wikimedia.org/wikipedia/commons/3/31/Trieste_nh96807.svg</A><BR>
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Best regards,<BR>
Jens Laland<BR>
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