Falcon 1
Falcon 1 became the first privately-developed liquid-fuel launch vehicle to go into orbit around the Earth.
The two-stage-to-orbit rocket used LOX/RP-1 for both stages, the first powered by a single Merlin engine and the second powered by a single Kestrel engine. It was designed by SpaceX from the ground up.
Following its fifth launch, Falcon 1 was retired and succeeded by Falcon 9.
Missions: 5
Successes: 2
Partial Failures: 0
Failures: 3
Success Streak: 2
Success Rate: 40.0%