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Mitty, W · 9th November 2005, 00:37

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.

Picture;
http://test.rebreatherworld.com/gallery/files/6/2/5/RBunit024.JPG
I assume this is assembled, same question on sealing the carts but what are those plastic barrel things?

Picture;
http://test.rebreatherworld.com/gallery/files/6/2/5/protoIIIa.jpg
Shows the lung, with two 'P' ports on it but this doesn’t seem to match the Rebreather unit???? Am I missing something here?
Also are they tyraps on the ADV thingy? Are they holding the diaphram on?

Picture;
http://test.rebreatherworld.com/gallery/files/6/2/5/proto_II_in_raw_state.jpg
What did it cost you to prototype II? Was it cheaper in ally than plastic?

Page;
http://www.deeplife.co.uk/files/One_Set_of_Solutions_to_CCR_Safety.pdf
Shows 5yr lifespan O2 cells, any information on these?

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.

9th November 2005, 00:37	#1 (permalink)
Mitty, W New Member Current Rebreather/s: Inspiration Classic MK 15.X Home Build Other Rebreather/s: Home Build Join Date: Nov 2005 Location: Osaka, Japan Posts: 12	Open source, I see problems. Questions. 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. Picture; http://test.rebreatherworld.com/gallery/files/6/2/5/RBunit024.JPG I assume this is assembled, same question on sealing the carts but what are those plastic barrel things? Picture; http://test.rebreatherworld.com/gallery/files/6/2/5/protoIIIa.jpg Shows the lung, with two 'P' ports on it but this doesn’t seem to match the Rebreather unit???? Am I missing something here? Also are they tyraps on the ADV thingy? Are they holding the diaphram on? Picture; http://test.rebreatherworld.com/gallery/files/6/2/5/proto_II_in_raw_state.jpg What did it cost you to prototype II? Was it cheaper in ally than plastic? Page; http://www.deeplife.co.uk/files/One_Set_of_Solutions_to_CCR_Safety.pdf Shows 5yr lifespan O2 cells, any information on these? 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. __________________ Waruteru. 犬が円形と円形歩けば, ポストにぶつかる Last edited by Mitty, W : 10th November 2005 at 12:13.
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