Mailing List Archive Mailing List Archive
On Mon, 17 Apr 1995, Scott Cherf wrote: [SNIP] > Using a front/back bag, it seems like the front bag would almost always > be empty, with all of the gas naturally migrating to the back when the > diver was horizontal. If this were the case, the front/back issue seems > to disappear; either put it on the front (so gas *can't* go back) or put it > on the back (because it *will* go there if you let it). I don't see the > point of the over the shoulder front/back configuration unless the diver > is vertical. Perhaps this is the normal position for cave divers? > > Any experiences that could clarify this? As far as I know, no rebreather design has both a front and back counterlung. The Cis-Lunar Mk-4 has two counterlungs, left and right, both up front. I have found that changing my orientation in the water has almost no effect on the breathing resistance (I don't understand it either). Breathing "back-pressure" (as I prefer to call the hydrostatic pressure component of rebreather breathing "resistance") depends more on the total volume of gas in the loop (i.e., how full the counterlungs are at a given lung volume). Learning to maintain optimal loop volume is a significant skill when training for rebreather diving. Aloha, Rich ******************************************************************* Richard Pyle deepreef@bi*.bi*.ha*.or* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]