<div dir="ltr">Sorry, should have clarified I was referring to Piccard not Cameron.<div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 16, 2016 at 2:46 PM, Alec Smyth <span dir="ltr"><<a href="mailto:alecsmyth@gmail.com" target="_blank">alecsmyth@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><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).<div><br></div><div>Best,</div><div><br></div><div>Alec</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 16, 2016 at 8:48 AM, Jens Laland via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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" rel="noreferrer" target="_blank">https://upload.wikimedia.org/w<wbr>ikipedia/commons/3/31/Trieste_<wbr>nh96807.svg</a><br>
<br>
Best regards,<br>
Jens Laland<br>
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