World's most efficient passenger plane gets hydrogen powertrain

The Celera 500L is a truly remarkable design. Otto Aviation says its odd shape delivers an astonishing 59 percent reduction in drag, and a massive leap in efficiency and range compared to traditional plane geometries. Arguably, this thing should've been electric from the get-go, so it's a no-brainer that Otto has teamed up with ZeroAvia to build a version with a hydrogen fuel cell powertrain.

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