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Sheldon names were used to identifylaunch vehicles of theSoviet Union when their Soviet names were unknown. The system was published by Dr. Charles Sheldon of theUnited States Library of Congress in 1968.[1] The system emphasizes the basic families of launch vehicles with special indicators for variants within a family.
A typical Sheldon name is the F-1-m, a forerunner to theTsyklon launch vehicle, or the F-2. The "F" indicates the launch vehicle family, the "1" indicates the upper stage, and the "m" indicates that the upper stage is manoeuvrable.
| Sheldon name | Soviet name | Year |
|---|---|---|
| A-1 | Vostok rocket | 1959 |
| A-2-e | Molniya | 1961 |
| A-2 | Soyuz rocket | 1963 |
| C-1 | Kosmos rocket | 1964 |
| D | Proton rocket | 1965 |
| D-1-e | Proton rocket | 1967 |
| D-1 | Proton rocket | 1968 |
| G-1-e | N-1 rocket | 1969 |
| F-2 | Tsyklon | 1977 |
| J-1 | Zenit rocket | 1985 |
| K-1 | Energia | 1987 |