Subsequent Models
The FT was discontinued in late 1945, replaced in production by the F2, which retained the 1,350 hp (1,010 kW) rating of the FT, but with upgraded electrical and control equipment. Additionally, the mechanically-driven cooling fans, which required constant tending by the locomotive's fireman, were replaced with electrically-driven fans which were automatically controlled, a system which is still in use to this day. The F2 was produced only in 1946, after which in turn it was replaced by updated models in the EMD F-unit series, such as the F3, F7, and F9.
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