D Perry, H2 Clipper launches funding round, Flight International, November 2022, p 48

In US, H2 Clipper is proposing a 304 m long airship using gaseous hydrogen for lift, and liquid hydrogen for fuel-cell propulsion with five electric motors. The payload will be up to 252 tonnes of cryogenic hydrogen, the speed up to 480 km/h, and the range over 9650 km. Customer delivery is expected by 2029.