Depends on the photogs. Some photogs understand steam engine operation, and want the kind of smoke (or clag as the Brits would call it) that would be typical of a working steam engine. And this is not always easy to accomplish, because photo freights often do not have the tonnage needed to make the engine work, or speeds are too slow, or both. So the results often are not fully satisfactory if the purpose is to recreate the real thing as closely as possible. The picture linked to above is a good example of too much smoke. One approach is to run trips in very cold weather where condensing vapor makes the clag more dramatic.
One of the great things about the C&TS is there is rarely any need to "fake it", because the grades are there and trains can be run reasonably close to rated tonnage.
JBWX
Edited 2 time(s). Last edit at 08/09/2008 07:35PM by John West.