The first X-51A flight was considered successful after it acheived Mach 5 speed at 70,000ft. The test last 140 seconds before it was aborted till to lost of telemetry.
Aviation News
The first X-51A flight was considered successful after it acheived Mach 5 speed at 70,000ft. The test last 140 seconds before it was aborted till to lost of telemetry.