Developed by HAW Hamburg, HydroProp is designed for 110 passengers and has a flight range of almost 2000 kilometres. It is based on a conventional design and is powered by two turboprop engines using direct hydrogen combustion, with the hydrogen stored cryogenically. The concept's fuselage is optimised for maximum aerodynamic efficiency and offers passenger comfort despite its windowless design, thanks to its built-in OLED displays.