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RE: [PSUBS-MAILIST] Ratio of ballast tank holes



Put a couple of extra holes in there Frank !
 
Brian
-----Original Message-----
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Alan James
Sent: Tuesday, May 18, 2010 11:33 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Ratio of ballast tank holes

Frank,
I've never heard of a diver blowing there BCD apart & the sought of scenario you are
talking about happens all the time scuba diving.
The last 30ft are the worst where the volume doubles to the surface.
You could do calculations based on your vent size. However I doubt wether your flying
saucer is going to exellerate that fast in an upward direction.
Alan
----- Original Message -----
Sent: Wednesday, May 19, 2010 5:32 PM
Subject: Re: [PSUBS-MAILIST] Ratio of ballast tank holes

In a message dated 5/18/2010 9:39:28 P.M. Pacific Daylight Time, hc.fulton@gmail.com writes:

Frank,

That is what I was alluding to when I answered the first thread.  Hugh.

 

Yes, Hugh. That's what I thought. There are several variables involved.
  I don't know if it would be a problem but the holes in my ballast tanks are two each at 2 inch diameter. I don't expect to use the bubble to ascend but it could be necessary under some unexpected circumstance. This is an area that I haven't done any testing on and like I said, the scenario pops into my thoughts from time to time.
 
Are you coming to the convention?  It's a long way for you but I know everyone would like to see you again. Hope you can make it.
Frank D.