The FP7 was essentially EMD's F7A locomotive extended by four feet to give greater water capacity for the steam generator for heating passenger trains. While EMD's E-units were successful passenger engines, their A1A-A1A wheel arrangement made them less useful in mountainous terrain.

Shown here (L to R) are PRR engines #7220, #9646, #9770-B, and #9492. #7220 is an EFS-17M built by EMD in 1957 and rated at 1,750 horsepower. #9646 and #9770-B are EF-15A's built by EMD and rated at 1,500 horsepower each; #9646 was built in 1950, but #9770-B was built in 1951. #9492 is an FF-16 built by Fairbanks-Morse in 1950 and rated at 1,600...

PRR 9657, EF-15A, 1964 : Description: 24th Street. Here is an original photo that I took of Pennsylvania Railroad trains in Altoona, Pennsylvania, on 29 November 1964. Shown here (R to L) are PRR engines #9657 and #9766-B. Both are EF-15A's built by EMD and rated at 1,500 horsepower each; #9657 was built in 1950, but #9766-@ was built in 1951.

Shown here (L to R) are PRR engines #9654 and at least two more "EF" Class units whose numbers are not recorded. All were built by GM-EMD and rated at 1,500 horsepower each. #9654 is an EF-15A built as an EH-15 in February of 1950, …

Conrail locomotive roster and history for the F7A, plus Penn Central, Erie Lackawanna.

The enhancements provided EMD’s F7 with increased tractive effort and improved longevity in continuously operating the unit’s new D27 traction motors. Some railfans separate these F3s into the unofficial “F5” grouping. PRR’s roster included approximately 80 F3As and 55 F3Bs with 25 examples falling into the F5 grouping.

Mar 21, 2025 · PRR 9765, EF-15A, c. 1962 : Description: Here is a duplicate 35mm color slide via Al Chione. Shown here (R to L) is Pennsylvania Railroad engine #9765 and three more units whose road numbers are not recorded. All were built …

Mar 24, 2025 · The EMD F3 is a 1 The EMD F7 is a 1,500 horsepower diesel locomotive built by General Motors' Electro-Motive Division between 1949 and 1953. The F7 was EMD's fourth model in the line of F-unit locomotives, and was by far the best-selling cab unit of all time. The F7 primarily differed from the F3 in internal equipment,

PRR 9804, EF-15A, 1965 : Description: Slope to Works. Here is an original photo that I took in Altoona, Pennsylvania, on 6 June 1965. Shown here (L to R) is Pennsylvania Railroad engine #9804 and two more units whose road numbers are not recorded. All were built by GM-EMD.

LGB 25570 PRR F7A Diesel Loco, 9833, Collection Item Between 1949 and 1953, the Electro Motive Division (EMD) of General Motors built an astounding 2,366 F7-A diesel locomotives. Boasting 1,500 horsepower and a handsome "Bulldog" nose, the F7 was and still is the classic icon of diesel railroading in America.