The Soviet, later Russian IDA71 military and naval rebreather is an oxygen rebreather intended for use by naval and military divers including Russian commando frogmen. As supplied it is in a plain backpack harness with no buoyancy aid. The casing is pressed aluminium with a hinged cover. It has a small optional nitrox cylinder which can be clipped on its outside to convert it to nitrox mode. It contains one oxygen cylinder and two absorbent canisters. In the bottom of its casing is an empty space which is intended for an underwater communications set.
3 views of a frogman with IDA rebreather
Here, "up", "back", etc. refer to a man wearing the set standing on land.
The casing is thinner towards the lower end, to reduce drag.
On the front of the harness of the navy frogman version there is a projecting metal plate intended to carry a limpet mine. The front of the harness is a tough rubber "apron".
The loop of each breathing tube can be strapped down to the shoulder to keep it under control to stop it from catching on things or being easily grabbed from behind.
On each side of the casing is a small clip to fasten a parachute to.
The IDA-71 can be used as an oxygen rebreather, or with the addition of an external cylinder, as a nitrox rebreather, which converts between nitrox and oxygen automatically by a pressure activated valve on the nitrox attachment.
It can run as an ordinary diving rebreather. Or it can be run with one of its two absorbent canisters filled with potassium superoxide, which gives off oxygen as it absorbs carbon dioxide: 4KO2 + 2CO2 = 2K2CO3 + 3O2; in this mode the oxygen cylinder is a bailout, or to fill and flush the circuit at the start of the dive.[1] This mode gives the set more duration underwater, but is dangerous and not to be risked by civilians because of the explosively hot reaction that happens if water gets on the potassium superoxide; whereas ordinary modern diver's rebreather absorbents have been designed to avoid producing a caustic solution (commonly called "cocktail") if they get wet. Tests at the United States Navy Experimental Diving Unit in Panama City, Florida showed that the IDA71 could give significantly longer dive time with superoxide in one of the canisters than without.
For many years the IDA71 and similar have been a standard Russian frogman's and naval work diver's breathing set. The "71" in its name may be the year that it was designed, like with the numbers in the names of the AK series of Russian rifles. The name IDA comes from Russian: Изолирующий дыхательный аппарат (translit. izoliruyushchiy dykhatel'nyy apparat, literally Insulating/Isolating Breathing Apparatus). Other name is Individual Breathing Apparatus (Russian: Индивидуальний дыхательный аппарат, translit. Individualniy Dykhatelniy Apparat).
In its original Russian mode as an oxygen rebreather, its dive duration is said to be 4 hours. Filling both canisters with soda lime and putting a second oxygen cylinder in the empty space at the bottom, might increase its dive duration to 8 hours.
IDA-71 external nitrox cylinder with regulator hoses and changeover valve
IDA-71 external nitrox cylinder with regulator hoses and changeover valve
IDA-71 Integrated cylinder valve and regulator of external nitrox set
IDA 71 rebreather and harness
IDA-71 rebreather top/front end showing ADV in the middle
Front end of IDA-71
Top/back view of IDA 71 in its casing
IDA-71 rebreather with breathing hoses and full face mask fitted. top view.
IDA-71 rebreather with breathing hoses and full face mask fitted
IDA-71 rebreather with breathing hoses and full face mask fitted
IDA-71 with lid of casing opened showing interior with counterlung, scrubber canisters and oxygen supply cylinder and regulator
IDA-71 with lid of casing opened showing interior with counterlung, scrubber canisters and oxygen supply cylinder and regulator
IDA-71 with lid of casing opened showing interior with counterlung, scrubber canisters and oxygen supply cylinder and regulator
Close up of oxygen supply cylinder and regulator in an IDA-71 rebreather
Close up of oxygen supply regulator in an IDA-71 rebreather
IDA-71 external Nitrox connection point
IDA-71 with lid of casing opened showing interior with counterlung, scrubber canisters and oxygen supply cylinder and regulator, and external nitrox supply plugged in
Closeup of the pressure activated nitrox changeover valve mounted on the external nitrox supply cylinder for an IDA-71 rebreather
Detail of the scrubber canister of an IDA-71 showing the filling port for absorbent medium
Another type of fullface mask sometimes supplied with an IDA71 rebreather
References
^Kelley, JS; Herron, JM; Dean, WW; Sundstrom, EB (1968). . US Navy Experimental Diving Unit Technical Report. NEDU-Evaluation-11-68. Archived from the original on May 9, 2008. Retrieved 2009-01-31.{{cite journal}}: CS1 maint: unfit URL (link)
[1], [2], [3] :: Russian frogman displaying on quayside at Sevastopol on Russian Navy Day with IDA71's with fullface masks with oval windows like an ordinary diving mask's, and AK47's or similar.
ida71, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, september, 2009, lea. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources IDA71 news newspapers books scholar JSTOR September 2009 Learn how and when to remove this template message The Soviet later Russian IDA71 military and naval rebreather is an oxygen rebreather intended for use by naval and military divers including Russian commando frogmen As supplied it is in a plain backpack harness with no buoyancy aid The casing is pressed aluminium with a hinged cover It has a small optional nitrox cylinder which can be clipped on its outside to convert it to nitrox mode It contains one oxygen cylinder and two absorbent canisters In the bottom of its casing is an empty space which is intended for an underwater communications set 3 views of a frogman with IDA rebreather Here up back etc refer to a man wearing the set standing on land The casing is thinner towards the lower end to reduce drag On the front of the harness of the navy frogman version there is a projecting metal plate intended to carry a limpet mine The front of the harness is a tough rubber apron The loop of each breathing tube can be strapped down to the shoulder to keep it under control to stop it from catching on things or being easily grabbed from behind On each side of the casing is a small clip to fasten a parachute to The IDA71 rebreather in action Contents 1 Operating modes 2 Gallery 3 References 4 External linksOperating modes EditThe IDA 71 can be used as an oxygen rebreather or with the addition of an external cylinder as a nitrox rebreather which converts between nitrox and oxygen automatically by a pressure activated valve on the nitrox attachment It can run as an ordinary diving rebreather Or it can be run with one of its two absorbent canisters filled with potassium superoxide which gives off oxygen as it absorbs carbon dioxide 4KO2 2CO2 2K2CO3 3O2 in this mode the oxygen cylinder is a bailout or to fill and flush the circuit at the start of the dive 1 This mode gives the set more duration underwater but is dangerous and not to be risked by civilians because of the explosively hot reaction that happens if water gets on the potassium superoxide whereas ordinary modern diver s rebreather absorbents have been designed to avoid producing a caustic solution commonly called cocktail if they get wet Tests at the United States Navy Experimental Diving Unit in Panama City Florida showed that the IDA71 could give significantly longer dive time with superoxide in one of the canisters than without For many years the IDA71 and similar have been a standard Russian frogman s and naval work diver s breathing set The 71 in its name may be the year that it was designed like with the numbers in the names of the AK series of Russian rifles The name IDA comes from Russian Izoliruyushij dyhatelnyj apparat translit izoliruyushchiy dykhatel nyy apparat literally Insulating Isolating Breathing Apparatus Other name is Individual Breathing Apparatus Russian Individualnij dyhatelnyj apparat translit Individualniy Dykhatelniy Apparat In its original Russian mode as an oxygen rebreather its dive duration is said to be 4 hours Filling both canisters with soda lime and putting a second oxygen cylinder in the empty space at the bottom might increase its dive duration to 8 hours A number of IDA71 s have found their way out of the ex USSR to Europe and America where recreational divers have added a wing buoyancy compensator and converted them into manually controlled closed circuit rebreathers Gallery Edit IDA 71 mask DSV and breathing hoses IDA 71 dive surface valve IDA 71 full face mask and DSV IDA 71 full face mask IDA 71 transport bag IDA 71 transport bag IDA 71 external nitrox cylinder with regulator hoses and changeover valve IDA 71 external nitrox cylinder with regulator hoses and changeover valve IDA 71 Integrated cylinder valve and regulator of external nitrox set IDA 71 rebreather and harness IDA 71 rebreather top front end showing ADV in the middle Front end of IDA 71 Top back view of IDA 71 in its casing IDA 71 rebreather with breathing hoses and full face mask fitted top view IDA 71 rebreather with breathing hoses and full face mask fitted IDA 71 rebreather with breathing hoses and full face mask fitted IDA 71 with lid of casing opened showing interior with counterlung scrubber canisters and oxygen supply cylinder and regulator IDA 71 with lid of casing opened showing interior with counterlung scrubber canisters and oxygen supply cylinder and regulator IDA 71 with lid of casing opened showing interior with counterlung scrubber canisters and oxygen supply cylinder and regulator Close up of oxygen supply cylinder and regulator in an IDA 71 rebreather Close up of oxygen supply regulator in an IDA 71 rebreather IDA 71 external Nitrox connection point IDA 71 with lid of casing opened showing interior with counterlung scrubber canisters and oxygen supply cylinder and regulator and external nitrox supply plugged in Closeup of the pressure activated nitrox changeover valve mounted on the external nitrox supply cylinder for an IDA 71 rebreather Detail of the scrubber canister of an IDA 71 showing the filling port for absorbent medium Another type of fullface mask sometimes supplied with an IDA71 rebreatherReferences Edit Kelley JS Herron JM Dean WW Sundstrom EB 1968 Mechanical and Operational Tests of a Russian Superoxide Rebreather US Navy Experimental Diving Unit Technical Report NEDU Evaluation 11 68 Archived from the original on May 9 2008 Retrieved 2009 01 31 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint unfit URL link External links Edit Underwater diving portalhttp www therebreathersite nl Zuurstofrebreathers Russian ida 71 htm information amp links http www therebreathersite nl Zuurstofrebreathers Russian photos ida 71 htm pictures amp links https web archive org web 20120314061648 http www smrebreathers ru rebreathers rebreather time before time boets2 jpg Frogman with IDA71 and APS underwater rifle 1 2 3 Russian frogman displaying on quayside at Sevastopol on Russian Navy Day with IDA71 s with fullface masks with oval windows like an ordinary diving mask s and AK47 s or similar Images of Russian frogmen on land http sport freepage de rsdas Swiss technical Info about IDA71 with pictures http www bleilatschen de idamania7 htm German Information use of the device field report Retrieved from https en wikipedia org w index php title IDA71 amp oldid 1119484309, wikipedia, wiki, book, books, library,
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