Stationary boilers and ship boilers condense their steam back to water and re-use it. Why don steam locomotives do that?
Some did – most notably, locomotives being operated in desert climates. However, these condenser units did not work very well. They work well in ships and stationary boilers because large cooling ponds or bodies are available to cool this steam back to water quickly. The equipment also takes up a lot of space – which is not available on a steam locomotive. 1522 never had any such device.
