Hawk & Badger Railroad Forum

Everyone is more familiar with the normal early "wheel status" of the 0-4-0s, 2-4-0s, etc , but I have run across some interesting alignments in a book titled: "The Illustrated Directly of North American Locomotives". Here are the expansions made for "more power":
Ruben Wells 0-10-0 1868
Central Pacific 4-10-0 1884
B&O Rwy 0-6-6-0 1903
Santa Fe 2-10-2 1903
AT&SF 4-4-6-2 1909 Mallet type
AT&SF 2-10-10-2 1911 3000 Class Mallet type
B&O Rwy 2-6-6-2 1911
Erie Rwy 2-8-8-8-2 1915 the last "8-2" are under the tender
Russian 2-10-10 1918 Decapod Frisco never left the U.S. due Russian Revolution
Virginia Rwy 2-10-10-2 1918 Mallet type
UP Rwy 4-12-2 1926
Canadian 4-4-4 1929
UP Rwy 4-6-6-4 1936 Challenger
UP Rwy 4-8-8-2 1938 Cab Front
UP Rwy 4-8-8-4 1941 big Boy w/ tender 4-4-6

This came from a book on Colorado Railroads: Unitah Rwy 2-6-6-2 for mine deliveries
Source forgotten of: a B&O K1 class 2-6-6-2 1911

I have found that most of these are separately cateloged for further details on stats.

Yes, people have been quite inventive in the search for more grunt. There are even stranger things out there if you look around. Some of the early Baldwins were very odd, and the Europeans got pretty experimental too.

BTW, the Decapod is 2-10-0, not 2-10-10. I think the "Canadian 4-4-4" is referring to the CPR F2a Jubilee, which was a very stylish class IMO.

Did the UP possess a 4-8-8-2 "Cab Front" (more correctly "Cab Forward" ? I thought this was an SP exclusivity ...

Yes, it was. There might be an error in the book that Ray used as a source.