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[quote]QUOTE: Originally posted by 440cuin That "European" system is a better system then ours, it defines more accurately, I forget what it is called. I believe even more accurate is a GG1 is 2'C-C2' or am I talking about another system all together? But even in parts of Europe they use other even more wierd systems. (did every factory use its own system??) The Whyte system realy only works on conventional steam engines. A challenger is not the same as a GG1 but I have to look it up to see the difference. The second set of drivers is rigid with the frame and boiler, not a seperate truck. [/quote] [#dots] (I wanted to put the one with the sign "off topic" here, but it's frowning, and I don't think there's anything here to frown about...) Here in Europe the system is a little more elaborate. And I'm definitely not the person who knows it all, but I know some basics. A GP40 for instance would be a Bo'-Bo' (the little o's should actually be raised a little, to the level of the apostroph, but I don't know how to do that on the keyboard) - meaning two two-axle trucks (B+B), and the little "o" meaning that each axle has its separate traction motor. Some (majority of?) older French electrics (not sure about the diesels) had one traction motor per truck, so a four-axle two-truck locomotive would be designated B'-B'. I'm not sure about the diesel-hydraulics, but logically they'd also be B'-B', C'-C' etc. And I think the apostroph stands for a truck (steam engines too) that rotates/swiwels in relation to the rest of the locomotive. So a Pacific type steamer (4-6-2) would be 2'-C-1', but I don't know about the Challenger (4-6-6-4) - is it a 2'-C'-C-2' or a 2'-C-C-2'? [zzz], you say? I can't blame you. Regards, Oliver
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