1870 series: 4 ft 1 in (1.245 m) 1884 and 1894 series: 4 ft 7.5 in (1.410 m)
Length
50 ft 7 in (15.42 m)
Loco weight
1870 series: 39.45 long tons (40.08 t; 44.18 short tons) 1884 series: 45.15 long tons (45.87 t; 50.57 short tons) 1894 series: 48.75 long tons (49.53 t; 54.60 short tons)
The Great Northern Railway (GNR) No. 1 class Stirling Single is a class of steam locomotive designed for express passenger work. Designed by Patrick Stirling, they are characterised by a single pair of large (8 ft 1 in) driving wheels which led to the nickname"eight-footer". Originally the locomotive was designed to haul up to 26 passenger carriages at an average speed of 47 miles per hour (76 km/h).[1] They could reach speeds of up to 85 mph (137 km/h).[2]