USSR-1
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USSR-1 was a record-setting, hydrogen-filled Soviet Air Forces high-altitude balloon designed to seat a crew of three and perform scientific studies of the Earth's stratosphere. On September 30, 1933,
USSR-1 over Moscow Kremlin on a 1933 postage stamp (Scott C37). Here the balloon is shown in low altitude configuration; in stratosphere the envelope expanded into a nearly perfect sphere. The balloon did not pass over the Kremlin directly, but it was clearly in sight for the first few hours of the flight.
USSR-1 balloon gondola displayed at the Central Air Force Museum in Monino, Russia.
Osoaviakhim-1
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Osoaviakhim-1 was a record-setting, hydrogen-filled Soviet high-altitude balloon designed to seat a crew of three and perform scientific studies of the Earth's stratosphere. On January 30, 1934, on it
USSR-1
…On September 30, 1933, USSR-1 under Georgy Prokofiev's command set an unofficial world altitude record of 18,501 m (60,699 ft). After the crash of Osoaviakhim-1 in January 1934 USSR-1 was retrofitted with a gondola parachute and a new gas envelope. On June 26, 1935, it flew again as USSR-1 Bis. The balloon…
Crash site
Fedoseenko, Vasenko, Usyskin on 1934 postage stamps. A similar set in different colors was issued in 1944.
Launch preparations