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Launch FailureNational Aeronautics and Space Administration

Redstone MRLV: Mercury-Redstone 1

Mercury-Redstone 1 (MR-1) was the first Mercury-Redstone uncrewed flight test in Project Mercury and the first attempt to launch a Mercury spacecraft with the Mercury-Redstone Launch Vehicle. Intended to be an uncrewed sub-orbital spaceflight, it was launched on November 21, 1960 from Cape Canaveral Air Force Station, Florida. The launch failed in abnormal fashion: immediately after the Mercury-Redstone rocket started to move, it shut itself down and settled back on the pad, after which the capsule jettisoned its escape rocket and deployed its recovery parachutes. The failure has been referred to as the "four-inch flight", for the approximate distance traveled by the launch vehicle.

Monday, 21 November 1960
Redstone MRLV: Mercury-Redstone 1

Mission Data

National Aeronautics and Space Administration
🇺🇸National Aeronautics and Space AdministrationEst. 1958
Launch VehicleRedstone MRLV
Vehicle FamilyRedstone
Vehicle Record5 of 6 launches (83.3%)
Provider TypeGovernment
Agency Record122 successes / 20 failures (86%)
Success Streak12 consecutive
ProgramMercury · Human Spaceflight
Mission TypeTest Flight
Target OrbitSuborbital
Launch PadLaunch Complex 5
Location🇺🇸 Cape Canaveral SFS, FL, USA USA
Agency Launches This Year#7
Launches From This Pad13
Launches From This Site1,132
Status Note

Either the launch vehicle did not reach orbit, or the payload(s) failed to separate.

About Redstone MRLV

The Mercury-Redstone Launch Vehicle, designed for NASA's Project Mercury, was the first American manned space booster. It was used for six sub-orbital Mercury flights from 1960–61; culminating with the launch of the first, and 11 weeks later, the second American (and the second and third humans) in space. The four subsequent Mercury human spaceflights used the more powerful Atlas booster to enter low Earth orbit. A member of the Redstone rocket family, it was derived from the U.S. Army's Redstone ballistic missile and the first stage of the related Jupiter-C launch vehicle; but to human-rate it, the structure and systems were modified to improve safety and reliability.

Launch Site

Launch Complex 5 · 28.4394°N 80.5733°W

Launch data from Launch Library 2 by The Space Devs.