QUOTE: 101 was built by American Car in 1917 as AG&StL 61. In 1926 the car became StL&ARy 61 and in 1930 it became IT 101. On March 9, 1956, it was sold to the Illinois Electric Railway Museum and is now at Union, IL.
QUOTE: The Pennsylvania Railroad used the largest direct-drive steam turbine locomotive in the world. Built by Baldwin Locomotive Works, the S2 Turbine, c/n 70900, was delivered to Pennsylvania Railroad in September of 1944. It was originally designed as a 4-8-4, but due to shortages of lightweight materials during World War II, the S2 became the only locomotive ever built with a 6-8-6 wheel arrangement. PRR #6200, the S2 turbine, had a maximum power output of 6,900 HP (5.1 MW) and was capable of speeds over 100mph. With the tender, the unit was approximately 123 feet long. While the gearing system was simpler than a generator, it had a fatal flaw: the turbine was inefficient at slow speeds. Below about 40 mph (64 km/h) the turbine used enormous amounts of steam and fuel. At high speeds, however, the S2 could propel heavy trains almost effortlessly and efficiently. The smooth turbine drive put far less stress on the track than a normal piston-driven locomotive. However, poor efficiency at slow speeds doomed this turbine, and with diesel-electrics being introduced, no more S2s were built. This magnificent machine was retired in 1949 and scrapped in May, 1953.
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