4-6-2

noun1

1. •
   Under the Whyte notation system, the wheel arrangement of a steam locomotive that has four coupled leading wheels, six coupled driving wheels, and a pair of trailing wheels; a locomotive with this arrangement.

   • Therefore, the new standard design in fact has materialised as a 4-6-2 with two 20 in. cylinders and a boiler pressure of 250 lb. per sq. in. — 1951