DARPA and the Navy had envisioned hyper-efficient cargo planes able to move thousands of tons by leveraging extra lift by flying close to the ground. Regent craft has a working 12 passenger version and has sales for a 100 passenger seaplane that would be about three times more fuel efficient than other planes. They do ...

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Link :
https://www.nextbigfuture.com/2025/08/regent-craft-wing-in-ground-effect-could-revive-giant-cargo-plane-dreams.html