What was the specific wheel arrangement used by the Tom Thumb locomotive?
Answer
0-2-0
The Tom Thumb locomotive featured an 0-2-0 wheel arrangement, which indicates that the machine had no leading or trailing wheels and instead relied solely on two coupled driving wheels to move. This design was simple and characteristic of the early experimental phase of locomotive development in the United States, where engineers were just beginning to adapt steam power to existing rail infrastructure. The 0-2-0 configuration limited the engine's stability compared to later designs, but it was sufficient to demonstrate the core capability of using steam to power rail transport.
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