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Parker · 1st May 2008, 11:56

Quote: (Originally Posted by OceanOpportunity)

discussions like this are always informative. It brings me to a train of thought from the design/mfg perspective however. That being, was there a specific reason that the O2 button was put on the inhale lung...or alternatively, it ended up on the inhale lung and a valid reason for it was found later?

What I do like about the Meg is the intuitive loop direction (inhale over right, exhale over left). If this were the primary design intention, and a rich on right/lean on left mantra was sought after, then the O2 button could've 'ended up' there. I'd be interested in comments from ISC on this.

I think that Jerry @ ISC has made it pretty clear why manual O2 injection is intended for the inhale (right) CL on the Meg. His words are around here somewhere and shouldn't be too hard to find. There is an injection valve on the exhale (left) CL that sits just below the ADV and looks just like the one on the inhale (right) CL. Now, some of us, depending on our needs and style of diving, looked at those two identical injection valves and said- hey buddy, hold my beer!

I'm gonna switch these hoses and see if it makes things any better. And some, like myself, found that injecting O2 into the exhale (left) CL makes a lot of since, especially when it comes to scootering in an overhead environment, managing a light, injecting gases, etc, etc... The O2 response time on the handset/HUD is a bit quicker when injecting on the exhale CL and it's the only way to go when doing a O2 flush on the loop. You don't have to squeeze the hose or anything. Just breath out, O2 flush, breath in, and repeat as necessary. The only real downside is it might take a little longer for the O2 to reach the divers lips in a hypoxic situation. But how often does this really happen? And if it does happen a lot- WHY? Who's not monitoring their handset/HUD? Even on a rapid ascent- one should know their target PO2 if nothing changes regarding O2/Dil injection.

If you think that you might like to experience the advantages of injecting O2 on the exhale (left) CL then give it a go. If not, and injecting on the inhale (right) CL makes more since- then there you go- stick with that!

We can all be happy

with our choice as long as there is sound reasoning behind it and it meets our needs, not just occasionally- but every time we dive the configuration.
Hope this helps!

Parker

1st May 2008, 11:56	#35 (permalink)
Parker what bubbles? Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: Jun 2007 Location: USA Posts: 60	Re: O2 slug Quote: (Originally Posted by OceanOpportunity) discussions like this are always informative. It brings me to a train of thought from the design/mfg perspective however. That being, was there a specific reason that the O2 button was put on the inhale lung...or alternatively, it ended up on the inhale lung and a valid reason for it was found later? What I do like about the Meg is the intuitive loop direction (inhale over right, exhale over left). If this were the primary design intention, and a rich on right/lean on left mantra was sought after, then the O2 button could've 'ended up' there. I'd be interested in comments from ISC on this. I think that Jerry @ ISC has made it pretty clear why manual O2 injection is intended for the inhale (right) CL on the Meg. His words are around here somewhere and shouldn't be too hard to find. There is an injection valve on the exhale (left) CL that sits just below the ADV and looks just like the one on the inhale (right) CL. Now, some of us, depending on our needs and style of diving, looked at those two identical injection valves and said- hey buddy, hold my beer! I'm gonna switch these hoses and see if it makes things any better. And some, like myself, found that injecting O2 into the exhale (left) CL makes a lot of since, especially when it comes to scootering in an overhead environment, managing a light, injecting gases, etc, etc... The O2 response time on the handset/HUD is a bit quicker when injecting on the exhale CL and it's the only way to go when doing a O2 flush on the loop. You don't have to squeeze the hose or anything. Just breath out, O2 flush, breath in, and repeat as necessary. The only real downside is it might take a little longer for the O2 to reach the divers lips in a hypoxic situation. But how often does this really happen? And if it does happen a lot- WHY? Who's not monitoring their handset/HUD? Even on a rapid ascent- one should know their target PO2 if nothing changes regarding O2/Dil injection. If you think that you might like to experience the advantages of injecting O2 on the exhale (left) CL then give it a go. If not, and injecting on the inhale (right) CL makes more since- then there you go- stick with that! We can all be happy with our choice as long as there is sound reasoning behind it and it meets our needs, not just occasionally- but every time we dive the configuration. Hope this helps! Parker
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