The Air Accidents Investigation Branch has published a report into an investigation into an accident involving a modified Piper PA-46-350P (G-HYZA) which occurred near Cranfield Airport in Bedfordshire on 29 April 2021.
During an experimental flight near Cranfield Airport of a modified Piper PA-46-350P (G-HYZA), an electrically powered aircraft with electrical power from hydrogen fuel cells, suffered a loss of power to the electrical motors. This meant a forced landing was carried out, which severely damaged the aircraft, the crew were unharmed.
The loss of power occurred during an interruption of the power supply when, as part of the test procedure, the battery was selected to OFF with the intention of leaving the electrical motors solely powered by the hydrogen fuel cell. During this interruption, the windmilling propeller on the aircraft generated voltage that was high…
AAIB Report: Modified electrically powered Piper PA-46-350P (G-HYZA), loss of power from hydrogen fuel cells – sUAS News
