04 Mar 2023 | Abstracted from Seattle Times
"..a large tank of liquid hydrogen in the back of the cabin, reducing the seating capacity from over 50 passengers to about 40...only test pilot Alex Kroll and two flight crew were on board..Plane flew [for 15 minutes] with one propeller powered by a regular Pratt & Whitney aviation fuel engine, the other by a motor fed electricity from a liquid hydrogen fuel cell."Once we hit cruise, we throttled back and we flew almost exclusively on the right-hand engine. It was silent."
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