Call me shallow, but aesthetics is a big part of the appeal of railroads and modelling. I've studied my own reactions to locomotives particularly - almost have it down to a science. Unfortunately, that means that I can't summarize them. It would take a small book. Maybe I'll post some of that...
In North America, steam switchers were typically 0-6-0 and 0-8-0 (and 0-4-0 in earlier times) tender engines. In Britain and Europe, the same wheel arrangements, but tank engines. In most of the rest of the world...?
The only other country I can think of to have 0-x-0 tender engines...
regarding the B30-7A(B)s being shipped to America Latina Logistica? http://www.railroadforums.com/forum/showthread.php?t=12979&page=2 The only report I can find on them is 10 weeks old.
On the prototype, how many trains can a one- two-, three- or four-track mainline handle per day? Under TT&TO, ABS, or CTC? I know the answers will be variable, but I'd like to have some idea.