LNER Class A4 4468 Mallard
London and North Eastern Railway locomotive numbered 4468 "Mallard" is a Class A4 4-6-2 Pacific steam locomotive built at Doncaster Works, England in 1938. It is historically significant as the holder of the world speed record for steam locomotives at .
Norfolk and Western 1218
During 1218's excursion career, it was the most powerful operational steam locomotive in the world, with a tractive effort of , well above the next-strongest-pulling operational steam locomotive (Union Pacific 3985, with a tractive effort of ). However, when Union Pacific 4014 finishes its restoration, 1218 will become the locomotive with the second highest tractive effort. Unlike diesel-electric locomotives of similar high tractive effort (for starting heavy trains) but typical for a steam locomotive, it could easily run at 70 miles per hour (113 km/h) and more.