4-12-2, Union Pacific Type;
Only one railroad, Union Pacific, utilized the 4-12-2 wheel arrangement in freight assignments. As a result, the engine's were given the "Union Pacific" moniker.
Curiously, despite its troubles with the 4-10-2 Southern Pacific/Overland it had purchased from the American Locomotive Company (Alco) a year earlier which utilized three cylinders UP still chose to purchase a design that featured the same setup.
The railroad was after a more powerful locomotive, which could be used in main line freight service at higher speeds and apparently was willing to deal with the maintenance headache of three-cylinder steam.
During the late 1920s UP went on to roster nearly 100 examples of this interesting wheel arrangement and overall the railroad turned out to be relatively pleased with its operational service.
The 4-12-2s remained in use for nearly 30 years until they were finally retired in the 1950s. Today, one example is preserved
---- She had the longest rigid wheelbase of locomotives in North America, measuring 91.5-feet.
---- The locomotive generated 4750 horsepower, giving her the ability travel up to 50mph.
(Info share from americanrails address)
---- With tender, the Union Pacific had a total weight of 807,099 lbs. She could carry 42,000 lbs of fuel and 18,000 gallons of water.
Submarine model from Raiders of the Lost Ark.
