Mockup or Training Berkut Voskhod-era Cosmonaut backpack, 12.75″ x 20″ x 4.25, weighing approximately 19 pounds, constructed of a smooth curved exterior with a 2″ gauge for “КГС/СМ²,” or ‘KGF/CM²’ (kilogram-force per square centimeter), with lower portion marked “КИСЛОРОД,” or “Oxygen.” The bottom left of the pack features a 21″ long connection hose constructed of material similar to Beta cloth and Mylar; the back of the pack has two mounts with loops and attached cloth straps that end with metal clasps and a locking mechanism. The backpack features overall scuffing, marks, and cracking, the dial contains interior soiling, and the hose bears wear to shell and inner material.
Similar to the PLSS used by NASA astronauts, life support was likewise contained in a backpack for their Soviet counterparts. This example, likely mockup or training hardware designed for the Berkut spacesuit, held a large enough oxygen supply to last for 45 minutes of activity. The Berkut (Russian Беркут, meaning Golden Eagle) suit model was developed to be used for extravehicular activity for the Voskhod 2 mission aboard a Voskhod spacecraft on the first spacewalk. The result was a modified SK-1 suit that was developed by NPP Zvezda in 1964-1965, and was used exclusively by the Voskhod 2 crew.
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