The British Rail Class 799 HydroFLEX is a prototype class of bi-mode multiple unit adapted from Class 319 electric multiple units (319001/382). The existing 25 kV AC and 750 V DC equipment has been retained with a hydrogen fuel cell added, currently taking up one of the carriages.
The British Rail Class 799 HydroFLEX is a prototype class of bi-mode multiple unit adapted from Class 319 electric multiple units (319001/382). The existing 25 kV AC and 750 V DC equipment has been retained with a hydrogen fuel cell added, currently taking up one of the carriages.
Source: Wikipedia "British Rail Class 799" · CC BY-SA 4.0
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