There was a standard for smoke density & quantity. I've seen a number of references to this standard and local city inspectors holding up a set of cards to judge the locomotive's smoke emissions. I cannot find any of these references now. What is the name of this standard?
I'd like to have a city car somewhere near one of the switching area, with an inspector holding up the cards. The city would love to get the Terminal to get rid of all of the steamers, but they haven't yet been able to convince management.
Solved! These are known as Ringelmann charts.
Do you know the answers to any of these questions? If so, PLEASE let me know.