Last Updated：2025/12/02
A notation for classifying steam locomotives by their wheel arrangement. For example, a locomotive with two leading axles (four wheels) in front, then three driving axles (six wheels) and then one trailing axle (two wheels) is denoted 4-6-2.
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Whyte notation
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Source Word
Whyte notation
Noun
uncountable
Japanese Meaning
蒸気機関車の車輪配置を表す分類記法。たとえば、前部に先行軸が2軸（4輪）、中央に駆動軸が3軸（6輪）、後部に後続軸が1軸（2輪）の機関車を「4-6-2」と表記する方法。
