Milwaukee Road class F7
The F7s are major contenders for the fastest steam locomotives ever built, as they ran at over daily. One run in January 1941 recorded by a reporter for "Trains" magazine saw achieved twice—in the midst of a heavy snowstorm. Baron Gérard Vuillet, a French railroading expert, once recorded a run between Chicago and Milwaukee where the locomotive reached and sustained an average for . However, the British locomotive LNER Class A4 4468 "Mallard" is officially accepted to be the world's fastest, with a run recorded at but authenticated at 126 mph in 1938.
Powhatan Arrow
Among the most famous steam power of the N&W were the Class "J" 4-8-4 steam locomotives. They were the pride of the N&W, pulling crack passenger trains such as the "Cavalier", the "Pocahontas" and the "Powhatan Arrow", as well as ferrying the Southern Railway's "Tennessean" and "Pelican" between Monroe, Virginia, and Bristol, Tennessee. On a test on the Pennsylvania Railroad, a "J" achieved 110 mph with a ten car, 1050-ton train along one section of flat, straight track in Pennsylvania. This was remarkable performance for a 70-inch drivered reciprocating steam locomotive. But, the only time the "J"s were able to do anything like that on N&W rails was on the Eastern portion of the line, between Petersburg and Norfolk. The average speed of the "Arrow" between Norfolk and Cincinnati, with much of the route through the mountains, was only about 43 mph. The "J"s were numbered from 600 through 613, and were built in three groups from 1941 to 1950, and the only surviving member of this famous class of locomotives is 611, currently operational.