X-59 starts engine run testing
Lockheed Martin Skunk Works in partnership with NASA Aeronautics, started X-59 engine run testing, marking the aircraft’s final major system check-out before taxi tests and first flight. The tests also mark the first time the X-59 was powered fully internally.
During the tests, Lockheed Martin is verifying inlet and nozzle performance, aircraft and engine structural and system interfaces, and engine control algorithms. Previously, the X-59 had been powered externally – electrically, hydraulically and pneumatically.
“It was an emotional high to see and hear another innovative, boundary-pushing Skunk Works X-plane come to life,” said Pat LeBeau, X-59 program manager, Lockheed Martin Skunk Works, in a company news release. “The team has done an incredible job, and we remain focused on the path forward to a safe and successful first flight.”
Engine runs are the last, critical system check-out prior to first flight that verifies proper functionality of the X-59 as an integrated system operating on its own power. The tests ensure the engine can be controlled through the vehicle management system and engine computer. They also verify management of the fuel system, vibration and temperature interactions and more.
Following these successful engine runs, the X-59 will be evaluated for electromagnetic interference effects, simulated in-flight failure modes and validation of the emergency power system. Once those are complete, the aircraft will undergo low-speed and high-speed taxi tests in preparation for first flight.
Roll out
As already reported, Lockheed Martin Skunk Works rolled out the X-59 on Jan. 12, 2024, a unique experimental aircraft designed to quiet the sonic boom, at a ceremony in Palmdale, California. The ceremony marked a significant milestone in Lockheed Martin’s and NASA’s decades-long journey to solve one of the most persistent challenges of supersonic flight – the sonic boom.
The X-59 is a one-of-a-kind test aircraft designed to achieve quiet supersonic flight and transform future commercial air travel. It is a singularly unique, national asset. Lockheed Martin and NASA are taking every precaution in a paced, systematic and disciplined approach to ensure safety and success of the mission.
QueSST
For more than a decade, Lockheed Martin Skunk Works and NASA have collaborated to solve one of the most persistent challenges of supersonic flight – the sonic boom. Lockheed Martin Skunk Works is leading the design, build and flight test of the X-59 quiet supersonic technology (QueSST) X-plane. The technology demonstrator will be flown over populated areas to provide U.S. and international regulators with statistically valid data required to help approve new rules that could allow quiet commercial supersonic flight over land, which could bring us one step closer to quiet supersonic travel for passengers around the globe.
The X-59 is an experimental supersonic aircraft shaped to reduce the loudness of a sonic boom reaching the ground to that of a gentle thump. The X-plane accomplishes this by a tailored design that separates the shock waves that produce sonic booms, making them quieter. The resulting supersonic “heartbeat” is dramatically quieter than the disruptive N-wave boom generated by today’s supersonic aircraft. We look forward to supporting NASA in the effort to obtain the data regulators will need to make informed decisions on appropriate sonic boom levels in the quest to remove the prohibition on supersonic over land flight.
Photo by Barry Tice / Lockheed Martin and NASA Headquarters / NASA/Steve Freeman
