UK investigators have determined that the windmilling propeller on an experimental Piper M350 – which had been modified with a hydrogen fuel-cell engine – locked out power to the electric motors, ...

ZeroAvia has tightened the experimental regime for its hydrogen fuel-cell aircraft testing, including management of commercial pressures, after a UK investigation into a serious loss-of-power accident ...

Here’s how to handle the throttle, propeller, and other controls to get the best glide if the engine in a single quits.