A 2-8-8-4 steam locomotive, under the Whyte notation, has two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. The type was generally named the Yellowstone, a name given it by the first owner, the Northern Pacific …

Under the Whyte notation for the classification of steam locomotives, a 2-8-8-8-4 has two leading wheels, three sets of eight driving wheels, and four trailing wheels. Other equivalent classifications are:

2024年9月28日 · The Yellowstone Type steam locomotive design, of the 2-8-8-4 wheel arrangement and an articulated design featured many of the peak technological advances of the motive power and being developed in the late 1920s had an extremely short lifespan, as some Yellowstones were barely 10 years of age before being retired!

This table compares the various Yellowstone designs along with that of the UP Big Boy and Western Pacific 2-8-8-2. All Yellowstone classes employed simple steam expansion and thus none can be called "mallets".

Under the Whyte notation, a 2-8-4 is a steam locomotive that has two unpowered leading wheels, followed by eight coupled and powered driving wheels, and four trailing wheels. This locomotive type is most often referred to as a Berkshire, though the Chesapeake and Ohio Railway used the name Kanawha for their 2-8-4s.

Z-5型2-8+8-4式“黄石”蒸汽机车是美国北太平洋铁路使用的一款“马莱”型铰接式干线蒸汽机车，主要牵引货运列车。 在1941年“大男孩”4-8+8-4式蒸汽机车出现之前，Z-5型2-8+8-4式“黄石”蒸汽机车是当时全球最大的蒸汽机车，无论是炉篦面积、加热面和过热面等在当时堪称举世无双。 背景. 1927年，北太平洋铁路与美国机车公司合作在4-8-2“山岳”式蒸汽机车的基础上开发出新型的4-8-4式客货混合型蒸汽机车。 基于与美国机车公司长期战略之合作，北太平洋铁路希望再度开发 …

根据从p34-0001号机车获得的经验教训，1951年，科洛姆纳工厂和全苏铁道运输科学研究院制定了2-8-8-2和2-8-8-4两种“马莱”铰接式蒸汽机车的设计草案。 此时已升任总工程师的列夫·谢尔盖维奇·列别姜斯基，选择了2-8-8-4轮式作为新的“马莱”铰接式蒸汽机车的轮式。

NP wanted to burn low-grade Rosebud coal (obtained from mines along the line) in their locomotives. This required the Yellowstone to be designed with a huge (the largest ever used on a steam locomotive) firebox (182 sq. ft.).

2006年6月14日 · Duluth, Missabe & Iron Range 2-8-8-4 No. 236 hauls an empty ore train north out of Two Harbors, Minn. DM&IR’s Yellowstones were equipped with all-weather cabs and centipede tenders. Two other railroads owned Yellowstones. Arguably the very best of the type were those of the Duluth, Missabe & Iron Range.

A 2-8-8-4 steam locomotive, under the Whyte notation, has two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. The type was generally named the Yellowstone, a name given it by the first owner, the Northern Pacific Railway , …