Introduced in 1939 as EMD's FT demonstrator and arguably the most successful and famous American diesel locomotive design of all time, the EMD F-unit almost single handedly helped usher in the diesel era.

By the end of WWII, and the diesel firmly established, the writing was on the wall that the diesel was in and steam was out. In less than 20 years, nearly all class-1 American railroads had achieved complete and total dieselisation

Locomotive Type: Diesel-Electric

Power: One EMD 567B 1,500hp (1,120kW) 16-cylinder two- stroke supplying current to four traction motors geared to the axles.\n\n"+

Max. Speed: Between 50mph (80kp/h) & 120mph (164kp/h) depending on which of eight possible gear ratios were fitted.

Tractive Effort: 57,500lb (256kN).

Height: 14ft 0.5in (4,280mm).

Weight: 230,000lb (104.4t) (minimum without train heating steam generator).

Length: ''A'' 50ft 8in (15,443mm).

Width: 10ft 7in (3,225mm).