Class Y6b (Locobase 1422) Data from N&W 3-1955 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

1950: PRR leased five steam locomotives from the Norfolk & Western for use between Columbus and Sandusky. The leased units were: 2-8-8-2 Y6 2130; 2-8-8-2 Y6b’s 2182, 2185-2187 . Broadway Limited Imports offers this locomotive.

The last compound Mallet locomotives to operate on major railroads in the United States were the 2-8-8-2 Y6b class of the Norfolk and Western Railway. After their final modifications in the 1950s, they were said to be capable of 170,000 lbs tractive effort in simple-expansion mode, although some have questioned this claim (the original design ...

Y型2-8+8-2式“切萨皮克”蒸汽机车是美国诺福克&西部铁路（外文名：Norfolk & Western Railway）使用的“马莱”型铰接式蒸汽机车，主要用来牵引货运列车。 自1910年首台2-8+8-2式“切萨皮克”蒸汽机车投入运用到1960年蒸汽机车时代结束，诺福克&西部铁路曾运用过7种不同类型的2-8+8-2式“切萨皮克”蒸汽机车，其服役时间长达近50年，是诺福克&西部铁路运用时间最长、技术最成熟的蒸汽机车之一。 背景. 诺福克&西部铁路是美国一级铁路公司，成立于1870年，因沿 …

The Norfolk and Western Class Y6b was a class of 2-8-8-2 Mallets built between 1948-1952 with a total of 30 examples built for the Norfolk and Western Railway. The Y6b was known as the workhorse of the Norfolk and Western Railway and the epitome of the compound mallet development design.

2005年4月21日 · PRR did in fact run Y-6B's. They didn't own them, they did own a piece of N & W. So these were leased engines used when the PRR needed additional horsepower. Since PRR had "sticky fingers" those Y-6B's undoubtedly spent the rest of their lives on PRR, and its subsidiaries, tracks.

2010年2月11日 · Apparently the Y6B had a compound arrangement. The Y3 and Y6b had identical sized cylinders. However, the Y3 had a 270 PSI boiler pressure whereas the Y6 variants had a 300 PSI boiler pressure. Here’s a link to specs for all N&W 2-8-8-2’s: http://www.steamlocomotive.com/articulated/nwy.shtml.

As Locobases 67, 5153, and 15921 show, the PRR found its superheavyweight freight hauler answer in the I1 series of 2-10-0s that premiered in 1916. Their boilers were worked hard, but contained much higher percentages of superheater area in their combined heating surface totals and their boilers were pressed a full 90 psi (6.2 bar) higher.

One of the great trinity of Roanoke steam, the Y6B was the penultimate Mallet. The Norfolk and Western built 30 of these monsters between 1948 and 1952 - a time when most railroads in the country had already completely dieselized.

Deliveries of Y6b's began in 1936 and were constructed in the railroad's own Roanoke Shops-a big boom to the local economy. This class was designed to pull very heavy trains at an average of 30-miles per hour, but they were so well balanced that under favorable conditions they could make 50 miles an hour without damage to either the rails or ...