Prototype diesel

Prototype diesel

By Faith Finfrock | September 16, 2020

| Last updated on August 8, 2025


Prototype diesel

An A-B set of drawbar-connected Boston & Maine EMD FTs (in Boston in March 1950) shows the distinctive four-porthole styling and close spacing between units. The boxy structure on the roof is the dynamic brake housing. The F unit’s “bulldog” carbody styling blended nicely with passenger cars but did not facilitate clear views to the rear for en route freight-car switching.
Photo by George Corey
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