Home Electric Aircraft Rolls-Royce debuts mtu fuel cell system and all-electric aircraft at COP26 Rolls-Royce debuts mtu fuel cell system and all-electric aircraft at COP26 5 Nov 2021 | Electric AircraftHydrogenNews Rolls-Royce debuts mtu fuel cell system and all-electric aircraft at COP26 Rolls-Royce has presented its new mtu fuel cell system for a future CO2-free energy supply for the first time at COP26 in Glasgow, Scotland