Four low temperature Proton Exchange Membrane fuel cell modules sit behind the 80 kW electric motor and single propeller(Credit: DLR)
A collaboration of aircraft makers, fuel cell developers and university engineers have come a step closer to zero emission passenger flights with the first flight of a hydrogen fuel cell four-seater electric aircraft. The twin-cabin, (relatively) low-noise HY4 took off at 11:15 am (local) today for a quick zip around Stuttgart Airport.
The HY4's 21.36 m (70 ft) wing is home to the HY4's central single propeller with a two-seater fuselage on either side, a design that's said to allow for "optimal distribution of the drive components and a higher total loading capacity." Each fuselage is home to a 9 kg (20 lb) hydrogen storage tank that feeds the four low temperature Proton Exchange Membrane fuel cell modules sat behind the prop. These cells convert hydrogen and oxygen into water and electrical energy.
The developers are keen to point out that should the hydrogen needed for the fuel cells be produced using renewable energy, the aircraft would fly completely emission-free though there was no mention of where the fuel was sourced for today's test flight.
The cells continuously power the aircraft's electric motor during flight, while 21 kWh lithium polymer battery packs help out during take-off and climb. The HY4 is reckoned capable of a maximum range of 1,500 km (930 mi), though this will depend on speed, altitude and load. It's 80 kW electric motor is said to make a maximum speed of around 200 km/h (124 mph) possible, with a cruising speed given as 145 km/h (90 mph)...snip Full Article: http://newatlas.com/hy4-hydrogen-fuel-cell-passenger-plane-test-flight/45687/