Under the Whyte Notation for the classification of Steam Locomotives , a Locomotive has two Leading Wheel s, six coupled Driving Wheel s and four Trailing Wheel s in a Trailing Truck . The equivalent UIC Classification is '''1'C2''''. The wheel arrangement is best known for the Austria n express locomotives class 210 of 1908 and class 310 of 1911 , both designed by Karl Gölsdorf ; it is sometimes known as the ''Adriatic'' arrangement, named for the Adriatic Sea which bordered Austria-Hungary until 1918 .
It was much more common as a Tank Locomotive arrangement, . These were produced for many different railway systems worldwide.
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