4-4-4

In 1934 the Baltimore and Ohio Railroad built a single class J-1 4-4-4 out of a 4-4-2 from the early 1900s, named Lady Baltimore. This locomotive and the lone V-2 4-6-4 Lord Baltimore were built for new lightweight passenger trains, in the former's case the Abraham Lincoln on the Chicago and Alton Railroad, a wholly owned subsidiary of the B&O. Despite the Alton's flat territory and straight track, the locomotive performed poorly. It was returned to the B&O and was modified at the railroad's Mount Clare shops with a less streamlined cab and front end. It was then placed into local service on the railroad's Wheeling Division, mostly operating between Holloway and Cleveland, Ohio. It proved no more successful than before and was sent to the B&O's Riverside Shop for storage, being scrapped in 1949.

Canadian Pacific

The Canadian Pacific Railway built two Royal Jubilee F classes locomotives, totaling 25 in all. They were built by the Montreal Locomotive Works and the Canadian Locomotive Company in 1936 and 1937. Both were semi-streamlined similarly to the 4-6-4 "Royal Hudson" and 2-10-4 "Selkirk" locomotives but much smaller. The F2a was styled after the Milwaukee Road's Class A "Hiawatha", but with a four-wheel trailing truck to support a longer firebox.

The Canadian Pacific Class F2a had 5 locomotives, Nos. 3000-3004. The most noticeable difference from the F1a is their main rods being connected to the lead driving axle. There were some problems with this, as they tended to bend the main rods when reversing. The pilot was smoothly rounded and streamlined with two stainless-steel bands. One of them managed to reach 112.5 mph during a braking test, a record for canadian steam. All of this group were scrapped.

The Canadian Pacific Class F1a had 20 locomotives, Nos. 2910-2929. Their main rods were connected to the rear drivers, and a more conventional pilot and straight pilot beam, a drop-coupler sheet steel pilot below that, and a more conventional front deck. Two of the class, Nos. 2928 and 2929, are preserved. No. 2928 is at the Canadian Railway Museum in Delson, Quebec, while No. 2929 is at Steamtown National Historic Site in Scranton, Pennsylvania.

Britain

In Britain the 4-4-4 arrangement was confined to tank locomotives and there to specific applications requiring either high speed stability in both directions (created by a symmetrical arrangement with bogies front and rear) or a powerful locomotive with as short a fixed wheelbase as possible. Eric G. Barker designed three examples for the Wirral Railway in 1896. The Midland and South Western Junction Railway purchased two 4-4-4 tank engines from Sharp, Stewart and Company but these were not a success due to their poor traction. The North Eastern Railway Class D was designed by Vincent Raven in 1913.{{Cite book |last=Ahrons |first=E. L. |author-link=E.L. Ahrons

Australia

The Western Australia Government Railway N Class 4-4-4 tank locomotives were introduced in 1896.

Hungary

MÁVAG introduced some MÁV Class 242 4-4-4 streamlined tank locomotives between 1936 and 1939.

India

The Vishveshwaraiah Iron and Steel Company, Bhadravati introduced a Class-E 4-4-4 tank engine in March 1921. No. 22782 was built by the North British Locomotive Company at Atlas Works, Glasgow in 1920, the first of 23 examples. It is currently exhibited in the Railway Museum in the Mysore Junction railway station.

Uruguay

The "D type" 4-4-4T of the Central Uruguay Railway were eight locomotives (Vulcan Foundry 1913 and 1915) for use in the suburban services around Montevideo Central Station.

Venezuela

The 3 ft 6 in (1,067 mm) gauge Gran Ferrocarril de Venezuela (Great Venezuela Railway) acquired a class of three 4-4-4T locomotives in 1892, the Cóndor, Gavilán and Halcón. They were built by Hartmann's Sächsische Maschinenfabrik in Chemnitz, Germany. Their maximum speed was 70 kph.

Halcón still exists and, after an overhaul in 1975, was in service on a heritage line until 1997. Today it is in a desolate condition.