4-6-6-2

In Whyte notation, a 4-6-6-2 is a steam locomotive with four leading wheels (two axles) in an unpowered bogie at the front of the locomotive followed by two sets of driving wheels with six wheels each (three axles each), followed by two unpowered trailing wheels (one axle) at the rear of the locomotive. Other equivalent classifications are:UIC classification: 2CC1 (also known as German classification and Italian classification)French classification: 230+031Turkish classification: 35+34Swiss classification: 3/5+3/4

4-6-6-2

In Whyte notation, a 4-6-6-2 is a steam locomotive with four leading wheels (two axles) in an unpowered bogie at the front of the locomotive followed by two sets of driving wheels with six wheels each (three axles each), followed by two unpowered trailing wheels (one axle) at the rear of the locomotive. Other equivalent classifications are:UIC classification: 2CC1 (also known as German classification and Italian classification)French classification: 230+031Turkish classification: 35+34Swiss classification: 3/5+3/4