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That's not a bad idea. I've long been a fan of fail-safe designs. It may
get a little complicated though. Might be better to have a very simple and quick
way to drop, like a big red button, rather than a timer and all the associated
mechanisms. There are things called "explosive bolts" but of course they have
their own set of problems. I'm expecting my drop weight mechanism to take
several minutes to operate, and I can see how that might be a problem if a very
quick release is needed. It operates by hydraulic pressure, and if that
fails, has a manual way also. Redundancy is a good thing when your life may be
at stake. Here's a sketch but it doesn't show the hydraulics, just the manual
device. A small hydraulic cylinder to rotate the drop pin, one small thru-hull
for the hydraulic line, and a hand or foot pump inside is all that's
missing. Frank D.
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