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Freedom 7 and Liberty Bell 7 the first two Mercury mission were launched on top of converted US Army Redstone rockets due to continued delays with the original planned Atlas booster.

The Redstone lacked sufficient power to achieve orbit but was able to propel the Mercury capsule in a 15-20 minute sub-orbital arc during which astronauts Alan Shepard and Gus Grisson experienced about 5 minutes of Zero-G.

For John Glenn's flight the Atlas booster was ready and able to put his spacecraft into orbit. Fellow Mercury astronauts Scott Carpenter, Wally Schirra and Gordon Cooper all flew on top of Atlas boosters. The Atlas was retired as a manned launcher after the end of the Mercury program in 1963 but continues today in a much altered and upgraded form as a satellite launch system.

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βˆ™ 12y ago
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βˆ™ 5mo ago

The Mercury-Redstone (MR-3) rocket was used to launch Mercury capsules into orbit for manned missions. This rocket was specifically designed to carry astronauts into space during the early years of the American space program.

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Q: What booster rocket launched Mercury capsules into orbit?
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