Below was my brand new conversion of IDA-71U into O2 CMF+bypass rebreather.  Recently i bought an IDA-71U for such a low cost that i can't pass by ;) At first, i want to convert it to pure O2 rebreather, and after many sleepless nights i made it!

Now this was pure O2 rebreather with constant supply of 1,5 l/mni O2 flow, 1 liter O2 200bar cylinder, one scrubber with ХПИ filling, that offers me 90-100 minutes of diving time, and manual bypass for any diver's needs...

 

So, here we begin ;)

 

Overview of rebreather with CMF+bypass attached.

 
1330
 
1331
 
1332
 

O2 cylinder with integrated 1st stage and low-pressure quick-seal connector by Camozzi Pneumatica, http://www.camozzi.it/camozzi/index.php?lang=en

This was only replace in original IDA-71U construction.

I think this offers more usability than original O2 cylinder connection system.

1333
 

Another overview of rebreather with CMF+bypass attached.

Clearly visible all hose's wiring. Centerline can was replaced by cut-off PVC tube 110mm diameter. Counterlung inlets were sealed by brass dummy-plugs (similar to Franken-Rig).

1334
 

Clean view of CMF and bypass system.

 
1335
 

Another clean view of CMF and bypass system.

Lower left - input hose from O2 supply from original IDA-71U nitrox connector.

Vertical rectangular-shaped aluminium body - hand-made oxygen collector.

Center left bolt - hollow-body bolt for oxygen bupassing.

Upper left bolt - Camozzi SCO 604-1/8, kind of needle-valve, main part of CMF system, set to deliver 1,5 l/min O2 flow.

Lower right - output hose to purge-line.

So, when pressed, the black mushroom-shaped button at top of photo switch O2 supply line between 1.5l/min CMF and direct addition to countelung with no limitations.

 
1337
 

Clean view on centerline can inlet plugs on countelung.

 
1338
 

I detach purge automatics from it's hoses, and use hoses to connect

CMF+bypass, that was attached to original nitrox cylinder

connector. So, quickly i can detach bypass and revert to original IDA-71U configuration as O2 regenerative rebreather with 2 cans.

All parts except O2 collector were standart industrial pneumatic parts from Camozzi. Conversion was quiet cost-efective - all parts (including hand-made) cost me less than $100 ;) Device was checked in nearby lake by 30-minutes dive on up to 7 meters depth. All works fine.

But, sorry, no in-water photos available due to this was solo dive.

Water was pretty warm - 12 deg.C compared to 7 deg.C air ;) I use it with original VM-5 full-face mask as shown at http://sport.freepage.de/cgi-bin/feets/freepage_ext/339483x434877d/rewrite/rsdas/REB6BIG.HTM

Later i think to made some kind of KISS rebreather.

Also, this summer i continue diving with my IDA-72SMG, up to 1 hour dive time and up to 20 meters deep, mostly in lakes and rivers.

No any troubles sighted.

 

Regards, Alexey Stekolshikow

 
 
Alexey, thanks for sending this homebuild project for my website again!
 
NEW PICTURES:
 
 
 
 
 


Please sign my Guestbook
Email: jw.bech@quicknet.nl
After the first rebreather published in this website and the testdive Alexey Stekolshikow now build his own IDA 71 U with CMF oxygen supply.
Here you find pictures to rebuild the IDA71U for the use with basic components to be used as oxygenrebreather. Please be carefull in modifying these units. They can only be dived upto 6 meters in this configuration!

Menu homebuilders

Updates

Speedmenu

Search page

Webshop

Home
Therebreathersite:
Mainmenu:

 
Search this Website
 Information about RB
 Photo galleries
 Historical Information
 Links & Downloads
 Reviews
 Homebuilders
 Electronics
 Updates, speed menu
 Web shop
 Reviews SC rebreathers
 Reviews CC rebreathers
 RBís through the ages
 Inspiration rebreather
 Database Oxygen RBís
 Database Semiclosed RBís
 Updates
 Speed menu
 Search this web
Alex Bannner