[PSUBS-MAILIST] emergency lift bags

[hank pronk via Personal_Submersibles]

There was a fatality in a Nekton submarine when a window was knocked off by a sinking yacht that was being salvaged.  So there are more dangers under the sea than just entanglements.  Is it a waste of money compared to electronic gadgets that do nothing but impress your neighbour.  There was recently a story told about a sub going down when near the surface and they were saved in the nick of time.  A lift bag system would have been pretty handy that day.
Hank

 Subject: Re: [PSUBS-MAILIST] emergency lift bags
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Wednesday, August 13, 2014, 6:04 PM
 
 Entangled
 to me is the operative word. These little boats all have
 multiple means of surfacing and would not require you to
 flood and escape if you had a loss of power, ran out of HP
 air, etc. Its really only entanglement that I see as likely
 to cause you to bail. However, if you don't rip yourself
 free with MBT blown, thrusters pushing, and emergency weight
 dropped, then you would probably need an awfully big lift
 bag to make a significant difference to the situation. Or
 think of it another way... you already have lift bags, they
 are called MBTs.
 
 Alec
 
 On Wed,
 Aug 13, 2014 at 5:30 PM, hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 When
 talking with a friend about escaping from a submarine, he
 asked why can't your sub have a lift bag capable of
 raising the sub even when full of water.  I could not give
 a good reason why not.  A large volume of air would be
 needed of coarse.  Some fast math on a napkin revealed that
 6 80cuft scuba tanks could raise Gamma from 600 feet.  Two
 240cu ft tanks strapped to the bottom of a sub and two lift
 bags, one at each end  could do it.  Why bail out why not
 just raise the whole thing unless your tangled and stuck of
 coarse.
 
 
 Just a thought
 
 Hank
 
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