Under the Whyte notation for the classification of steam locomotives, 4-8-4 represents the wheel arrangement of four leading wheels on two axles, eight powered and coupled driving wheels on four axles and four trailing wheels on two axles.

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-8-4+4-8-4 is a Garratt locomotive. The wheel arrangement is effectively two 4-8-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units.

The 4-8-4 was the ultimate wheel configuration for the modern passenger and fast freight steam locomotive. The eight driver arrangement was usable on almost every main line in North America and with drivers up to 80 inches in diameter allowed …

A 4-8-8-4 in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck.

4-8-4 NORTHERN STEAM LOCOMOTIVE Under the Whyte notation for the classification of steam locomotives, 4-8-4 represents the wheel arrangement of four leading wheels on two axles, eight powered and coupled driving wheels on four axles and four trailing wheels on two axles.

The stability of the 4-8-4 wheel arrangement meant that driving wheels up to 80 inches (2.0 m) diameter could be used for high speed passenger and fast freight operation. Lateral control devices allowed these locomotives to traverse relatively sharp curves despite their …

Many consider the 4-8-8-4s or "Big Boys" to be the largest steam locomotives ever built in the entire world. It would be hard to argue differently.

Jun 19, 2006 · Canadian National and its subsidiaries owned North America’s largest fleet of 4-8-4s, including five streamlined versions built in 1936 to haul passenger trains between Montreal and Toronto.

Feb 20, 2020 · 4-8-4 •YEARS BUILT: 1926 to 1950 •MANUFACTURERS: Baldwin, Lima, Alco, Canadian Locomotive Co., Canadian Pacific Railway, Montreal, Norfolk & Western •OPERATED ON: Most sizable railroads that provided fast freight and passenger service •NAME: Northern •QUANTITY: 1,115; Canadian National had more than 200 •BOILER PRESSURE: 250-300 psi

Dec 11, 2024 · Under the Whyte notation system, a steam locomotive that has four leading wheels arranged in a leading truck, eight coupled driving wheels and four trailing wheels in a trailing truck.