Turbine inlet scrolls at the Ardnacrusha hydroelectric power plant in Ireland, c. 1928.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...s_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...ine_inlets.jpg
Previously:
https://www.homemadetools.net/forum/...059#post172055
https://www.homemadetools.net/forum/...221#post172704
https://www.homemadetools.net/forum/...758#post163556
https://www.homemadetools.net/forum/...134#post161016
https://www.homemadetools.net/forum/...753#post155933