Working Drawing for Nos 323, 324

(There are discrepancies in these engine numbers, making it difficult to identify engines in this instance). Cylinder diameter 1ft 2in, stroke 1ft 8in for the Northern and Eastern Railway; driving wheels 6ft diameter; the sandwich iron plate wooden frames are placed inside the driving wheels which have no outside bearings; there are no central or other frames; driving springs are underhung. This drawing marks an interesting transition between Robert Stephenson's patent design of 1833 and 1841. Drawing reference - 87.