0-8-4

plural 0-8-4s

1. Under the Whyte notation, a steam locomotive that has eight coupled driving wheels followed by four trailing wheels, with no leading wheels.

   The 0-8-4 with its 13 six-wheel coaches generally managed to keep "neck-and-neck" with the Tredegar 0-6-0 and its load of five or six coaches, but the combined effort made the welkin ring and excitement reigned among both the train-crews and passengers.

   1953 April, J. M. Dunn, “Memories of the L.N.W.R. 0-8-4 Tank Engines”, in Railway Magazine, page 237