#1544
SEK Class Theta-alpha
🇧🇬 Bulgaria ·built by Hanomag· from 1911· class of 1 Greek (ex Bulgarian) 2-8-0 locomotive
what is it?
SEK (Sidirodromoi Ellinikou Kratous, Hellenic State Railways) class Θα (or class THb; Theta-alpha) is a class of one 2-8-0 steam locomotives, acquired after the First World War. Originally one of the Bulgarian State Railways' (BDŽ) 700 series four-cylinder compound locomotives that had been built by Hanomag in 1911 as BDŽ 705. It was given the class letters "Θα" by the SEK and initially numbered 601 before being renumbered 501.
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 115 years ago, in 1911.
- Weighs about as much as 11 African elephants (~6 t each).
- 17.4 m long: about 4 cars parked nose to tail.
steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.
spec sheet
- built
- 1911
- number built
- —
- kind
- Steam
- traction
- steam
- origin
- 🇧🇬 Bulgaria
- builders
- Hanomag
- operators
- Bulgarian State Railways, Hellenic State Railways
- top speed
- 65 km/h
- power
- —
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- 2-8-0
- length
- 17.4 m
- weight
- 68.7 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q39046965, Wikipedia: SEK Class Theta-alpha (CC BY-SA 4.0).Updated 2026-10-25.