The LB&SCR I3 class was a class of 4-4-2 steam tank locomotives designed by D. E. Marsh for suburban passenger service on the London, Brighton and South Coast Railway.
I3 class 32078 at Brighton 19 March 1950
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, 4-4-2 represents a configuration of a four-wheeled leading bogie, four powered and coupled driving wheels, and two trailing wheels supporting part of the weight of the boiler and firebox. This allows a larger firebox and boiler than the 4-4-0 configuration.
Milwaukee Road class A2 no. 919, built 1901
The KFNB IId Class
SNCB Class 12 No. 12004, c. 1940
Prussian S 7 Class