Tsyklon-2
The Tsyklon-2 (Cyclone-2), also known as Tsiklon-2 and Tsyklon-M (known as SL-11 by the United States DoD), GRAU index 11K69, was a Ukrainian, previously Soviet orbital carrier rocket used from the 1960s to the late 2000s. It was the most reliable Soviet/Russian carrier rocket ever used. Along with Tsyklon-3, the Tsyklon-2 was retired in favor of new-generation and all-Russian carrier rockets, such as the Angara and Soyuz-2.
Missions: 106
Successes: 102
Partial Failures: 2
Failures: 2
Success Streak: 18
Success Rate: 97.2%