DARPA Funded Two Wing in Ground Effect Transport Planes• https://www.nextbigfuture.com, by Brian Wang
The Liberty Lifter program aims to demonstrate a leap-ahead in operational capability by designing, building, floating, and flying a long-range, low-cost X-Plane capable of seaborne strategic and tactical heavy lift.
The planned Liberty Lifter demonstrator will be a large flying boat similar in size and capacity to the C-17 Globemaster III transport aircraft. Goals include takeoff and land in Sea State 4, sustained on-water operation up to Sea State 5, and extended flight close to the water in ground effect with the capability to fly out of ground effect at altitudes up to 10,000 feet above sea level.
"We are excited to kick off this program and looking forward to working closely with both performer teams as they mature their point-of-departure design concepts through Phase 1," said DARPA Liberty Lifter Program Manager Christopher Kent. "The two teams have taken distinctly different design approaches that will enable us to explore a relatively large design space during Phase 1."
"Liberty Lifter will use low-cost manufacturing akin to ship fabrication in building a highly innovative seaplane capable of meeting DoD heavy lift requirements [100+ tons] that operates with runway and port independence."