The X-150-H is a proof of concept aircraft based on the airframe of the planned X-150 narrow-body airliner.
The X-150-H is designed to test the idea of hydrogen fuel cell powered propeller engines for larger aircraft.
Due to the lower fuel density and the need to store the propellant in specific tanks as opposed to the wings, it only has a range of ~688.5km.
The maximum altitude is however in line with existing airliners, being capable of 12.5km/~40,000ft. It's top speed is somewhere between 135 and 140m/s due to the use of propellers making it much slower than jet aircraft, but substantially more eco-friendly.
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Slider 1 controls the flaps, Slider 2 controls the stabiliser trim, Slider 3 controls the propeller pitch and AG1 activates/deactivates the fuel cells.