Footplate of the 'The Mallard' 4-6-2 steam
© National Railway Museum / Science & Society Picture Library -- All rights reserved
Footplate of the 'The Mallard' 4-6-2 steam locomotive, no 4468, 1938. Seen to the upper left of the firehole is the steam chest presure gauge, while to the right is the boiler presure gauge. This clas A4 locomotive was designed by Sir Nigel Gresley (1876-1941), chief mechanical engineer for the London & North Eastern Railway (LNER) and built at the Doncaster works in Yorkshire. On Sunday 3 July 1938 the locomotive reached a speed of 126 mph on a stretch of track between Grantham and Peterborough, achieving a new world record for steam locomotives.