Under the Whyte notation for the classification of locomotives, 4-6-4 represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France where the type was first used, it is known as the Baltic while it became known as the Hudson in most of North America. [1]

The new 4-6-4 locomotive had a slightly larger boiler evaporative heating surface, 24 sq. ft. more of firebox and 14 sq. ft. more of grate area. This new design could produce much more steam per square foot of heating surface and needed a much larger superheater to maintain the same steam temperature as the K-5's.

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-6-4+4-6-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-6-4 locomotives operating back to back, with the boiler and …

2024年11月6日 · Introduced during the height of the Super Power era, the 4-6-4, known affectionately as the "Hudson," is a hallmark of the New York Central’s illustrious history. This innovative design quickly became synonymous with the New York Central, which was instrumental in its development and subsequent rise to fame.

In Whyte notation, a 4-6-4-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of four driving wheels and four trailing wheels. Other equivalent classifications are: UIC classification (also known as German or Italian classification): 2CB2; French classification: 2322

Under the Whyte notation for the classification of locomotives, 4-6-4 represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France where the type was first used, it is known as the Baltic while it became known as the Hudson in most of North America.

車輪配置 4-6-4 (しゃりんはいち4-6-4、ホワイト式分類)は2軸先輪・3軸動輪・2軸従輪で構成されるものをさす。 アメリカ式分類 での愛称は原則テンダー機が「 ハドソン ( Hudson )」で、タンク機が「 バルチック ( Baltic )」 [ 1 ] 。

Hudson type locomotives set the world record for steam locomotive speed on two different occasions, most recently in 1936 when a German 4-6-4 reach 124.5 miles per hour. The locomotive would keep the record for a short two years when at ‘Heavy Pacific’-type nicknamed the Mallard would set a new record of 126 mph, a record that still stands today.

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