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Sponge-Bob · 27th November 2006, 23:36

Quote: (Originally Posted by Mitty, W)

A few questions are bouncing around upstairs, hope someone can shed some light.
Picture;
http://test.rebreatherworld.com/gallery/files/6/2/5/RBunit011.JPG
Shows the two extendair carts in place, how is it sealed to prevent bypass? Most Micropore units have a sealing ring required, there isn’t one here.

Page;
http://www.deeplife.co.uk/files/One_Set_of_Solutions_to_CCR_Safety.pdf
In particular the "Save the Looney" part disturbs me somewhat.

Beyond allowed depth, or mix, unit warns user
If warning is ignored, then tells user it will shut off the gas
If warning is ignored, it keeps shutting auto-shutoff valve momentarily making it very uncomfortable to breath

This seems to be an accident in the making. According to the incident reports compiled by Brian Cumming, a great deal of problems occurred due to the perception of equipment failure. The over-breathing of regulators and all the panic inducing complications of equipment miss-use. The above would induce such panic, especially in one who has a potential problem already which is why they are deeper than planned????
If this is indeed aimed at numpties, and all failures etc. Then the "only competent users" is a bit of an oxymoron. IMHO.

Reviewing the auto shut off auto bail valve, how would the system respond to insufficient bail gas? How would you go semi-closed to increase endurance in the event of a bail gas equipment failure? I don’t see a way of manually attaining a SC configuration without the electrickery going mental. As i understand it, the manual override keeps popping out if the Rebreather isn’t happy.

The fan that is fitted inside the loop, this is used in the same loop that will be pure oxygen? Sounds dodgy. Do you have a prototype? Or even a picture of how you intent to make a functional one? There doesnt seem to be anything in the design documents on your sites.

Same document, it states;1.

Without predive checks, user cannot dive unless they manage to get to below 10m. When they are doing this, the unit tries to inflate the breathing bag to max

That 10m is the most critical for pressure related injuries, burst lung anyone?

Last one, in the document;
http://www.deeplife.co.uk/files/How_Rebreathers_Kill_People.pdf
The failures listed in the "incident reports", failures 4,6,7,9, and 13. Risking being judgmental, they sound like user error, only seen this when the foolhardy set up their kit wrong or have too little experience. Would this not be better resolved by improving training standards?

Thanks for your time.

Hi,
The save the looney part also disturbs me somewhat. My experience is that most divers are looney and most over estimate their ability. Messing with their breathing rates will only increase their descent into the pit of panic! Through no fault of his own, like going to the aid of another diver for instance, a diver may find himself beyond the limits of the unit. It needs to be his saviour, not his enemy.

27th November 2006, 23:36	#48 (permalink)
Sponge-Bob New Member Current Rebreather/s: Inspiration Classic Other CCR Dolphin Ray Other Rebreather/s: Other CCR Dolphin Ray Join Date: Nov 2006 Location: Scotland Posts: 29	Re: Open source, I see problems. Questions. Quote: (Originally Posted by Mitty, W) A few questions are bouncing around upstairs, hope someone can shed some light. Picture; http://test.rebreatherworld.com/gallery/files/6/2/5/RBunit011.JPG Shows the two extendair carts in place, how is it sealed to prevent bypass? Most Micropore units have a sealing ring required, there isn’t one here. Page; http://www.deeplife.co.uk/files/One_Set_of_Solutions_to_CCR_Safety.pdf In particular the "Save the Looney" part disturbs me somewhat. Beyond allowed depth, or mix, unit warns user If warning is ignored, then tells user it will shut off the gas If warning is ignored, it keeps shutting auto-shutoff valve momentarily making it very uncomfortable to breath This seems to be an accident in the making. According to the incident reports compiled by Brian Cumming, a great deal of problems occurred due to the perception of equipment failure. The over-breathing of regulators and all the panic inducing complications of equipment miss-use. The above would induce such panic, especially in one who has a potential problem already which is why they are deeper than planned???? If this is indeed aimed at numpties, and all failures etc. Then the "only competent users" is a bit of an oxymoron. IMHO. Reviewing the auto shut off auto bail valve, how would the system respond to insufficient bail gas? How would you go semi-closed to increase endurance in the event of a bail gas equipment failure? I don’t see a way of manually attaining a SC configuration without the electrickery going mental. As i understand it, the manual override keeps popping out if the Rebreather isn’t happy. The fan that is fitted inside the loop, this is used in the same loop that will be pure oxygen? Sounds dodgy. Do you have a prototype? Or even a picture of how you intent to make a functional one? There doesnt seem to be anything in the design documents on your sites. Same document, it states;1. Without predive checks, user cannot dive unless they manage to get to below 10m. When they are doing this, the unit tries to inflate the breathing bag to max That 10m is the most critical for pressure related injuries, burst lung anyone? Last one, in the document; http://www.deeplife.co.uk/files/How_Rebreathers_Kill_People.pdf The failures listed in the "incident reports", failures 4,6,7,9, and 13. Risking being judgmental, they sound like user error, only seen this when the foolhardy set up their kit wrong or have too little experience. Would this not be better resolved by improving training standards? Thanks for your time. Hi, The save the looney part also disturbs me somewhat. My experience is that most divers are looney and most over estimate their ability. Messing with their breathing rates will only increase their descent into the pit of panic! Through no fault of his own, like going to the aid of another diver for instance, a diver may find himself beyond the limits of the unit. It needs to be his saviour, not his enemy. __________________ If you want a Guarantee.....Buy a toaster! Last edited by Sponge-Bob : 27th November 2006 at 23:41.
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