A photographic tribute to the breakthrough F unit. Examine the diesel locomotive that essentially ran steam engines out of operation! Between the end of World War II and the 1960s, F units were the primary freight and passenger haulers for railroads all across the country. Rarely seen vintage photos from the David P. Morgan Memorial Library show F units hard at work during this period. *Features action shots of original FTs, F3s, F7s, F9s, and more *Includes production histories and some prototype illustrations *Extends the Golden Years Series by focusing on a single locomotive