FLUGZEUG MIT EINEM ANTRIEBS- UND ENERGIESYSTEM FÜR EMISSIONSARMEN REISEFLUG

The invention relates to a hybrid electric drive system (10) for multi-motor aircraft (20). The hybrid electric drive system comprises at least a first and a second hybrid electric drive unit (31, 32), each of which comprises: an internal combustion engine (41, 42), a motor-generator unit (71, 72) and a gear box (51, 52) for transmitting drive power to a propeller (61, 62). In order to supply the motor-generator units (71, 72) with electrical energy, the drive system (10) has a fuel cell (73), which in turn is supplied with hydrogen by means of a fuel tank (74). In the fuel cell (73), hydrogen is converted into electricity, which then supplies the motor-generator unit (71, 72) with electrical power by means of the transmission device (80) and power converters (81) and (82), in order to drive the propellers (61, 62). Advantages: On the basis of a turboprop aircraft (20) with approximately 40 to 90 passengers, approximately 40% of the energy during a 1-hour mission can be provided emission-free by means of hydrogen and fuel cell. This means no CO2 emissions at all during the cruising flight and also no climate-damaging exhaust-gas and contrail effects at cruising altitude (FL250), which are a significant share of aviation emissions.