LNER Class A4 4468 Mallard is a 4-6-2 (“Pacific”) steam locomotive built in 1938 for operation on the London and North Eastern Railway (LNER) at Doncaster Works to a design of Nigel Gresley. Its streamlined, wind tunnel tested[1] design allowed it to haul long-distance express passenger services at high speeds. On 3 July 1938, Mallard broke the world speed record for steam locomotives at 126 mph (203 km/h), which still stands today. | LW Photography

LNER Class A4 4468 "Mallard" | Worldwide Rails

The 4468 Mallard Is Such a Badass Train, and Not Just Because It Went 126 mph