Little Joe 1A

**Little Joe 1A**
Mission Insignia

Mission Statistics
Mission Name:	Little Joe 1A
Call Sign:	LJ-1A
Number of Crew Members:	Unmanned
Launch:	November 4, 1959 Wallops Island
Landing:	November 4, 1959
Duration:	8 min 11 s
Number of Orbits:	suborbital
Apogee:	9 mi (14.5 km)
Distance Traveled:	11.5 mi (18.5 km)
Maximum velocity:	2,022 mph 3,254 km/h
Peak acceleration:	16.9 g (166 m/s²)
Mass:	1,007 kg
LJ-1A

File:GPN-2000-001270 LJ1A.jpg

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