RDS-1
| RDS-1 | |
|---|---|
The first Soviet atomic bomb, "RDS-1", was an implosion-type, like the U.S. "Fat Man" bomb, even in appearance; the front "eyes" are radar fuzes. | |
| Type | Nuclear weapon |
| Place of origin | Soviet Union |
| Specifications | |
| Mass | 4.6 tons |
| Blast yield | 21 kt (88 TJ) |
The RDS-1 (Russian: РДС-1), also known as Izdeliye 501 (device 501) and First Lightning (Russian: Пе́рвая мо́лния, tr. Pyérvaya mólniya, IPA: [ˈpʲervəjə ˈmolnʲɪjə]), was the nuclear bomb used in the Soviet Union's first nuclear weapon test. The United States assigned it the code-name Joe-1, in reference to Joseph Stalin. It was detonated on 29 August 1949 at 7:00 a.m., at the Semipalatinsk Test Site, Kazakh SSR, after top-secret research and development as part of the Soviet atomic bomb project.
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