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ZeroAvia Crash Investigation Complete: It Wasn't the Hydrogen

12 Jul 2022 | Abstracted from New Atlas

"The problem...was that when the battery system was switched off and power to the propeller was cut, the airflow through the prop begin driving it, causing the electric motors to begin acting as generators.

"As ZeroAvia expanded the flight envelope to test higher speeds, the voltage generated by the free-wheeling prop increased to a point where it triggered the overvoltage protection on the inverter, shutting the system down."



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