Cosmos-2I
Kosmos-2I (also known as Cosmos-2I) is the designation applied to two Soviet carrier rockets, members of the R-12 Kosmos (rocket family), which were used to orbit satellites between 1961 and 1977. They were superseded by the R-14 derived Kosmos-3 and Kosmos-3M.
Missions: 126
Successes: 118
Partial Failures: 0
Failures: 8
Success Streak: 14
Success Rate: 93.7%