Hi Jay, So size my relief valve(s) to be able to handle the maximum expansion rate expected. Check It might be a little hard to calculate the acceleration of a given sub, when dealing with both buoyant left, hydrodynamic drag of the whole craft, being in salt or freshwater, and distance the sub will travel before it gets to the surface. I might of missed a couple elements. Perhaps I can use my FlowWorks software I've never used, in Solidworks to figure out drag. Your resident pipe dreamer ;)' Regards, Szybowski From: bottomgun@mindspring.com To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] Venting an Ambient Date: Fri, 5 Sep 2008 06:18:22 -0400 Brent, This goes against basic physics. If you have only a partial fill of a volume at depth, you will accelerate as you near the surface and pressure drops unless you can vent the expanding air (you will find this difficult as you manage all of the surfacing functions). You should always size your relief valves to be able to handle the maximum expansion rate. R/Jay
Respectfully, Jay K. Jeffries Andros Is., Bahamas
Talk sense to a fool and he calls you foolish. - Euripides (484 BC - 406 BC)
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Your expanding air filled dreamer ;)'
From: brenthartwig@hotmail.com Your resident pontoon dreamer ;)'
From: joeperkel@hotmail.com |