Atlas-OV1
The Atlas E/F (or SB-1A) was an American expendable launch system built using parts of decommissioned SM-65 Atlas missiles. The Atlas E/F was used between 1968 and 1971 to launch OV1 satellites, using OV1 upper stages. Each payload had its own upper stage.
Missions: 11
Successes: 7
Partial Failures: 2
Failures: 2
Success Streak: 4
Success Rate: 72.7%