The EMD SD50 is a 3,500- horsepower (2,610 kW) diesel-electric locomotive built by General Motors Electro-Motive Division. It was introduced in May 1981 as part of EMD's "50 Series"; production ceased in January 1986.

The SD50 was a significantly smaller percentage of the NS roster during its operating tenure. Prior to the Conrail break up in 1999, there were only 26 units on the roster. With the splitting of Conrail assets between CSX and NS, the latter received 78 …

Apr 7, 2025 · Rebuilt from SD50S and SD50 units. 6400-6451* 46* 2: EMD/NS: SD40-3: SD40-3: 3,000: Rebuilt from SD40-2 units. (6 additional units currently undergoing rebuilding.) 6649-6661* 12* 5: EMD/NS: GP59E: ... EMD/NS. SD60E. SD60E. 4,000. Rebuilt NS SD60 units with NS-designed widenose and cab. 7100-7150* 48* 10: EMD. GP60. GP60. 3,800 . 7229-7339* 45 ...

Sold to NREX, to PRLX.

Dec 16, 2024 · The standard production SD50 was cataloged only between November, 1984-May, 1985 and subsequently replaced by the SD60, equipped with EMD's latest 710 prime mover. The sterling reputation of La Grange began to waver during the 1980s and the SD50 was a contributing factor.

Classic Conrail - SD50 awaits a call to duty. Straying from its "assignment" to Dillerville Yard in Lancaster, PA (note the lettering just to the left of the "NS" on the cab), the class unit in the Conrail SD50 fleet is fourth on 11J. A Conrail Quality SD50 is the third unit on this eastbound passing through Cassandra, PA at night.

Engines at the Juniata Locomotive Shop include a pair of SD50s, D9-40CW 8936 and a primer ES40DC. It lists this engine in the database as an SD50, but it is really and SD60.

The SD50 was an interim locomotive design, a step up in performance and efficiency from the SD40-2 but not quite as good as the SD60. Conrail purchased a total of 135 units between 1983 and 1986, making them the second largest owner of the model next to …

It became NS PRR 5424, Class SD50 in July 1999 and renumbered NS 5424, Class SD50. It was rebuilt as 6357, Class SD40E, on January 27, 2014. 5425, Class SD50, was built in May 1984, #837065-6, FN 837065-6, as Conrail 6745, Class SD-50.

SOUND FUNCTIONALITY FEATURES (GOLD LOCOMOTIVES ONLY): shutdown, prime mover sounds through all eight notches, bell, air horn, air compressor, dynamic brakes and more. There are up to 16 user-selectable horns, 2 user-selectable bells, and …