#germany #rhine #river #photography #trains
This is such a great photograph. Photographer and Description is Unknown.

TRAIN ROUTE ALONG THE RHINE RIVER, GERMANY

• The color of exhaust you see coming out of a steam locomotive’s smoke stack indicates how efficiently it is burning fuel. Darker or blacker smoke is an indication that small fuel particles (coal, wood, fuel oil, etc.) have made it through the firebox unburned and are therefore wasted. Light or nearly invisible exhaust means that the locomotive fuel is mostly burned and transformed into heat, carbon dioxide, water, and trace elements. Factors affecting how efficient a locomotive burns fuel include the skill of the fireman on the engine, the quality of the fuel used, the design of the locomotive itself, and the amount of work the engine is doing. Similar concerns affect the efficiency of internal combustion engine locomotives as well.