[PSUBS-MAILIST] emergency lift bags

Thu Aug 14 16:42:04 EDT 2014

Hank, trouble is if you are at max depth the air won't go as far.  DW2000
would be lucky to have 100 lbs of buoyancy (figuratively speaking). They
work on plan B.
Another side of the problem is that if you are caught by the tail and you
blow tanks then you have to see that the tanks will work at a reasonably
steep angle.
I am planning on putting in a couple of emergency bags but I think we are
overdoing that side.  As they say "Plan the dive and Dive the plan" should
keep you out of most trouble with the emphasis on what if S--- happens.
With the advent of Kevlar fishing gear and ropes the danger is increasing.
I plan on keeping in touch with the tech divers who have the ability to
rescue me at depth.  They can do 400 ft but would have to be brave to do 600
ft.  However if you need extra ballast then you can do worse than adding Air
cylinders.  Chs Hugh

-----Original Message-----
From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of hank pronk via Personal_Submersibles
Sent: Friday, 15 August 2014 12:49 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] emergency lift bags

--------------------------------------------
Hugh,
If I was entangled in a net or line  that was attached to the bottom, I
think I would be happy to have an extra 5,000 lbs of lifting force.  I would
prefer to have 5,800 lbs force trying to break free than 800lbs force.  In
my line of work, when I can't lift it, pull it or push it, I add more power!
It might be futile with an extra 5,000lbs but I would sure like to
opportunity to try.
Hank

 Subject: Re: [PSUBS-MAILIST] emergency lift bags
 To: "'Personal Submersibles General Discussion'"
<personal_submersibles at psubs.org>
 Received: Wednesday, August 13, 2014, 5:49 PM

 Ask him what to do when
 entangled with a net or line attached to the bottom!

 -----Original
 Message-----
 From: Personal_Submersibles
 [mailto:personal_submersibles-bounces at psubs.org]
 On Behalf Of hank pronk via
 Personal_Submersibles
 Sent: Thursday, 14
 August 2014 9:31 a.m.
 To: personal_submersibles at psubs.org
 Subject: [PSUBS-MAILIST] emergency lift bags

 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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