British LSWR O2 class 0-4-4T. Under the Whyte notation for the classification of steam locomotives, 0-4-4 represents the wheel arrangement of no leading wheels, four powered and coupled driving wheels on two axles, and four trailing wheels on two axles. This type was only used for tank locomotives.

A 0-4-4 RT wheel arrangement, that is four driving wheels followed by a truck with four wheels (though the term has become somewhat generic; many small tank engines of various wheel arrangements have been called Forneys).

0-4-4T: 4'-8½" NYE (WACC) tundra near mouth of Soloman River between Council and Nome, Solomon, AK

The NER Class O (LNER Class G5) was a class of 0-4-4T steam locomotives of the North Eastern Railway, [1] [2] designed by the company's Chief Engineer, Wilson Worsdell. [2] They all survived into British Railways ownership in 1948 and their BR numbers were 67240-67349.

Often described as a Forney type, the Bock #1 burned wood, which meant mounting a Radley & Hunter 9" (229 mm) diameter spark-arresting stack. Its fuel load of 1 cord of wood rode in a racks built around the water tank mounted on the frame behind the cab.

One example of a Forney 0-4-4T locomotive built in 1902 by Baldwin Locomotive Works has been restored for daily operations on the Disneyland Railroad in Anaheim, California, as the railroad's number 5, Ward Kimball. Forney was born March 28, 1835 in Hanover, Pennsylvania.

Under the Whyte notation for the classification of steam locomotives, 0-4-4 represents the wheel arrangement of no leading wheels, four powered and coupled driving wheels on two axles, and four trailing wheels on two axles.

Forney locomotives almost always had four driven wheels in a rigid, non-articulated frame beneath the boiler. The most common wheel arrangement was 0-4-4, although some 2-4-4s were build for the Maine two-foot-gauge lines.

On becoming the North Eastern Railway's (NER) Locomotive Superintendent, Wilson Worsdell switched the NER's passenger tank locomotive policy from his brother's 2-4-2T Class A (LNER F8) design, back to a design resembling Fletcher's 0-4-4T BTP (LNER G6), with his G5 design.

The Caledonian Railway had a large number of 0-4-4T tank locomotives built between 1884 and 1925, which were intended for local passenger traffic in Edinburgh and Glasgow. One of four chief engineers who procured these locomotives was John F. McIntosh.