STOCKTON AND DARLINGTON ENGINE 1832-36

     This class of engines were in extensive use on the Stockton and Darlington line in 1832 & 1836 and were built by both Hawthorn and Stephenson.

     They had boilers 13 ft. long, 44"dia., the fire place was in a tube 29" dia. and 9 ft. long, the firedoor being at the same end as the stack. At the end of this tube farthest from the stack the flame was divided and the heat returned through a group of copper tubes on each side of the fire place.

     The smoke box received the products of combustion from both groups of tubes and communicated with the stack in the usual way. There were 53 tubes on each side of the fire tube, their length being 4 feet and outside diameter 1¾". The arrangement of smoke box is shown in detail.

     These engines required a tender for coal at one end and one for water at the other.