Tag Archives: First Stage Separation

16 July 1969, 13:34:42.30 UTC, T + 2:42.30

Apollo 11 S-1C first stage separation at 2 minutes, 41 seconds, altitude 42 miles, speed 6,164 mph, has burned 4,700,000 pounds of propellant. (NASA)
Apollo 11 S-1C first stage separation at 2 minutes, 41 seconds, altitude 42 miles (67.6 kilometers), speed 6,164 mph (9,920 kph), has burned 4,700,000 pounds (2,131,884 kilograms) of propellant. (NASA)

16 July 1969: At 13:34:42.30 UTC, 2 minutes, 42.30 seconds after launch, the S-IC first stage of the Apollo 11/Saturn V has burned out and is jettisoned. Apollo 11 has reached an altitude of 42 miles (68 kilometers) and a speed of 6,164 miles per hour (9,920 kilometers per hour). The five Rocketdyne F-1 engines have burned 4,700,000 pounds (2,132,000 kilograms) of liquid oxygen and RP-1 propellant.

After separation, the S-IC first stage continued upward on a ballistic trajectory to approximately 68 miles (109.4 kilometers) altitude, reaching its apex at T+4:29.1, then fell back to Earth. It landed in the Atlantic Ocean approximately 350 miles (563.3 kilometers) downrange.

© 2015, Bryan R. Swopes

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14 November 1969, 16:24:42.4 UTC, T plus 2:42.4

Saturn V S-IC first stage separation. (NASA)
Saturn V S-IC first stage separation. (NASA)

14 November 1969, 16:24:43.4 UTC: The Apollo 12 Saturn 5 passes 42 miles (67 kilometers) altitude at 5,145 miles per hour (8,280 kilometers per hour). The rocket reaches it maximum inertial acceleration of 3.91 g.

At T plus 2 minutes, 42.4 seconds, Apollo 12’s S-IC first stage separates. 0.8 seconds later, the S-II stage Rocketdyne J-2 engines ignited.

© 2016, Bryan R. Swopes

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