Saturn I Block 1

SA-1 through SA-4

Mission Profile

Saturn I Block 1 was the first operational variant of NASA's Saturn I rocket, the initial vehicle in the Saturn family developed under Wernher von Braun to support the Apollo Moon program. Standing 50 meters tall with a liftoff mass of 460,000 kg and generating 6,700 kN of thrust from its cluster of eight H-1 engines, it could deliver 9,100 kg to low Earth orbit. Launched four times between October 1961 and March 1963 on unmanned test flights, the Block 1 validated the innovative 'cluster' approach of grouping multiple existing rocket engines to achieve heavy-lift capability, a design philosophy that proved foundational for future American heavy launch vehicles. Each successful flight built the confidence in Saturn propulsion that would ultimately take humans to the Moon.