Aviation News – July 11, 2025 – U.S aerospace companies Aurora Flight Sciences and General Atomics (GA) have been instructed to halt development of their Liberty Lifter concepts, following the conclusion of the program by the Defense Advanced Research Projects Agency (DARPA) in June 2025.
Launched in 2022, the Liberty Lifter program aimed to create an affordable “X-plane” capable of transporting heavy payloads over long distances using ground-effect flight. Both Aurora and GA had been selected to design and develop this revolutionary cargo aircraft. The program emphasized low-cost production, operational flexibility, and maritime takeoff and landing capabilities.
After a program restructure to focus on areas with the highest technical risk, DARPA reported that extensive simulations and materials testing have “convincingly demonstrated” the feasibility of the Liberty Lifter concept. However, despite these promising results, the agency has decided not to proceed with the construction of a full-scale demonstrator based on the companies’ proposed designs.
Instead, DARPA is now working closely with industry and defense partners to transition the program’s technologies and findings. The goal is to accelerate the development and fielding of next-generation airlift platforms that leverage the innovations developed during the Liberty Lifter initiative.
DARPA’s original specifications for the Liberty Lifter included the ability to:
- Fly at altitudes up to 10,000 feet (3,048 meters)
- Operate in ground-effect mode in wave conditions up to 4 meters high
- Cover a range of over 6,500 nautical miles (12,038 kilometers)
- Transport payloads equivalent to two USMC Amphibious Combat Vehicles (ACVs) or six 20-foot container units
Though Aurora Flight Sciences and General Atomics will not continue with prototype development, the technological groundwork laid by the program could still play a crucial role in shaping future strategic and tactical airlift solutions for both military and civilian use.
Image DARPA
