Little Joe 1A

Little Joe 1A
Mission insignia
Mission statistics
Mission name	Little Joe 1A
Spacecraft mass	1,007 kilograms (2,220 lb)
Crew size	Unmanned
Call sign	LJ-1A
Launch date	November 4, 1959 Wallops Island
Landing	November 4, 1959
Mission duration	8 min 11 s
Number of orbits	suborbital
Apogee	9 miles (14 km)
Distance traveled	11.5 miles (18.5 km)
Maximum velocity	2,022 miles per hour (3,254 km/h)
Peak acceleration	166 m/s² (16.9 g)
Related missions
Previous Subsequent LJ-6 LJ-2

Little Joe 1A. (NASA)

Little Joe 1A (LJ-1A) was an unmanned rocket launched as part of NASA's Mercury program on November 4, 1959. This flight, a repeat of the Little Joe 1 (LJ-1) launch, was to test a launch abort under high aerodynamic load conditions. After lift-off, the pressure sensing system was to indicate when the correct abort dynamic pressure was reached. This should have happened about thirty seconds after launch. A signal was sent to the explosive bolts to separate the spacecraft from the launch vehicle. Up to this point, everything was going as planned. The impulse was also intended to ignite the escape motor. The motor was ignited, but it took a number of seconds to build up thrust, and thus the abort maneuver was not accomplished at the desired dynamic pressure. Because of this, a repeat of the test was planned. Other events from launch through recovery occurred without incident. An altitude of 9 statute miles (14.5 km) and a range of 11.5 statute miles (18.5 km) were obtained, and a speed of 2,021.6 miles per hour (3,254 km/h) was reached. Flight time 8 minutes 11 seconds. Payload 1,007 kg.

See also

• Little Joe

 This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.