1 photo from Wikimedia Commons · credits & licences
- 1. KCS 701 EMD SD40X: terry cantrell· CC BY-SA 2.0
what is it?
The EMD SD40X is a 6-axle experimental diesel-electric locomotive built by General Motors Electro-Motive Division between 1964 and 1965. Nine examples of this locomotive were built for test purposes to test the new 645-series prime mover 16-645E3. After testing, eight were sold to the Union Pacific Railroad and one example to the Gulf, Mobile and Ohio Railroad.
base stats
Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.
fun facts
- First built 62 years ago, in 1964.
- 2.6 MW is about 31 family cars (~85 kW each) flat out.
diesel locomotive: A diesel engine on board drives the wheels, usually through a generator (diesel-electric).
spec sheet
- built
- 1964–1979
- number built
- 13
- kind
- Diesel-electric
- traction
- diesel
- builders
- Electro-Motive Division
- top speed
- —
- power
- 2.6 MW
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- C-C
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q5323466, Wikipedia: EMD SD40X (CC BY-SA 4.0).Updated 2026-10-25.