South African Railways - SAR Class 25 condensing steam loc… | Flickr
Steam Engine Research/Condenser - Open Source Ecology
Why did steam locomotives not have condensers to recycle the spent steam? The thermal efficiency would be a lot higher. - Quora
Why did steam locomotives not cool and recycle the steam/water back to the boiler to increase the range, like the primary loop in a power station? - Quora
Book Review: Camels and Cadillacs - A History of the South African Railways 25 Class Condensers and 25NC 4-8-4's — Coalition for Sustainable Rail