One of Claus's pictures was of a cut of tank cars being
loaded (unloaded?) that were blue flagged. I've always
understood the meaning of those flaggings ... but I've
never known/learned "how long did it take to load/unload
a 10k tank car?".
I notice, for instance, that in the picture that Claus posted
the link to there are no "workers" in the pic (at least none
that I noticed/picked out). Presumably the loading process
took considerable time. And had an automatic "shut off"?
- Jim B.