2 photos from Wikimedia Commons · credits & licences
- 1. SM31-130: Wojciech Skibiński· CC BY 3.0
- 2. SM31-044a locomotive: Original uploader was Sigman at pl.wikipedia· CC BY-SA 3.0
what is it?
SM31 (production model 411D) is a Polish series of diesel shunting locomotives used by PKP and industry.
who runs it
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 50 years ago, in 1976.
- 880 kW is about 10 family cars (~85 kW each) flat out.
- Weighs about as much as 19 African elephants (~6 t each).
- 17 m long: about 4 cars parked nose to tail.
diesel locomotive: A diesel engine on board drives the wheels, usually through a generator (diesel-electric).
spec sheet
- built
- 1976–1985
- in service from
- 1976
- number built
- 200
- kind
- Diesel-electric
- traction
- diesel
- origin
- 🇵🇱 Poland
- builders
- Fablok
- operators
- Polish State Railways
- top speed
- 80 km/h
- power
- 880 kW
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- Co′Co′
- length
- 17 m
- weight
- 116 t
- nicknames
- Trumna
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q739262, Wikipedia: PKP class SM31 (CC BY-SA 4.0).Updated 2026-10-25.