Deutsche Aircraft has acquired a Dornier 328, and signed an MoU with H2Fly to work together on hydrogen fuel cell R&D with a view to getting zero-emissions powertrains into commercial regional aircraft – without the long recharging times, heavy weight and restricted range of lithium battery systems.The standard Dornier 328 plane weighs 9,100 kg (20,062 lb), and runs twin Pratt & Whitney turboprop engines making a total of 1,625 kW (2,179 hp). In hydrogen-electric trim, the demonstrator plane will roll out a 1,500-kW (2,012-hp) fuel cell, which the companies say will make it the most powerful hydrogen aircraft ever. ZeroAvia, for comparison, is in the process of building its 19-seat HyFlyer II, with twin H2 powertrains delivering a total of 1,200 kW (1,609 hp).