I recently visited a museum at Valley Heights (in the Blue Mountains) NSW Australia. The main purpose was to view a 46 class locomotive built by Metro Vicks at Bowesfield Works, Yarm Road Stockton in 1956.
Quite a bit of restoration work has been carried out. They were designed to generate enough power coming down the mountain, to drive another locomotive back up the mountain. Considered one of the most powerful electric locomotives of its time.
Photographs and details courtesy of Colin Booth.