The Low-Density Supersonic Decelerator or LDSD is a reentry vehicle designed to test techniques for atmospheric entry on Mars.

[1] Upon slowing to Mach 4.08, the 6-meter (20 ft) tube-shaped Supersonic Inflatable Aerodynamic Decelerator (SIAD-R configuration) deployed.

[8] However, it began tearing apart after deployment,[9] and the vehicle impacted the Pacific Ocean at 21:35 UTC (11:35 local) travelling 32 to 48 kilometers per hour (20 to 30 mph).

[7][10] Despite the parachute incident, the mission was declared a success; the primary goal was proving the flight worthiness of the test vehicle, while SIAD and SSDS were secondary experiments.

[12][13] As in the first test, the SIAD structure inflated successfully but the parachute was damaged during deployment,[14][3] this time after 600 ms and at 80,000 pounds (36,000 kg) drag.