Russian Rebreathers?

[Anthony Appleyard]

Anthony, Did you ever get a good answer on the amount of sorb, and duration of that Russian rig? If not, I have a friend who has several, and I can get the info from him. Rob

At last, back to topic, after all that Russian language stuff.

I have heard differing answers, on this thread and elsewhere.

The IDA71 as made in Russia comes with one oxygen cylinder, and 2 canisters. In the bottom end of the casing is an empty space intended to accommodate an underwater ultrasound communicater.

Here I give numbers to various modes:-
(1) As an ordinary oxygen rebreather with an oxygen cylinder and one canister filled with sodalime.
(2) Both canisters are filled with sodalime, and a second oxygen cylinder put in the empty space at the bottom. That mode needs alterations in a workshop.
(3) With the second canister filled with potassium superoxide or similar. That mode is dangerous because of the violently heat-generating reaction that happens if the potassium superoxide or whatever gets wet. That is a Russian mode intended for use by combat frogmen.
(1n),(2n),(3n): As above but in nitrox mode with a Russian-made diluent cylinder clipped on the outside of the set's casing.
(4) With the second canister replaced by a second cylinder, and variations on that theme. That produces a nitrox set. That mode needs alterations in a workshop. Many IDA71's in the West are in that sort of mode.

One informant told me that in mode 1 the duration is 4 hours.

That caused a guess that in mode 2 the duration is 8 hours.

Another informant told me that in mode 1 the duration is about 2.5 hours.

Please what is the duration in these various modes?

See message #15 in this thread for 2 CGI images that I made showing guesses as possible action using the IDA71.

 

[Anthony Appleyard]

With potassium superoxide, 4 KO2 + 2 CO2 -> 2 K2CO3 + 3O2.

 

[Anthony Appleyard]

This image of a Russian frogman with an IDA71 and an APS underwater rifle was on one of your messages :: what sort of weight-carrying system do they use?

If Russian sea is usually that green color due to algae, now I know why the backpack set is green and not black.

 

[abnfrog]

the military has a tenancy to paint stuff green .......

 

[nadwidny]

9+ year thread resurrection. That has got to be a record.

 

[Dr. Lecter]

what is this?

A good way to kill yourself if you have to ask the question in the first place.