#1722
Triplex locomotive
🇺🇸 United States ·built by Baldwin Locomotive Works· from 1914· steam locomotive with three sets of driving wheels
1 photo from Wikimedia Commons · credits & licences
- 1. ERIE 28882: Rmislan· CC BY-SA 4.0
what is it?
A triplex locomotive was a steam locomotive class that divided the driving force on its wheels by using three pairs of cylinders to drive three sets of driving wheels. Any such locomotive will inevitably be articulated. All triplex locomotives built were of the Mallet type, but with an extra set of driving wheels under the tender.
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 112 years ago, in 1914.
steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.
spec sheet
- built
- 1914–1916
- retired
- 1933
- status
- retired
- number built
- 3
- kind
- Steam
- traction
- steam
- origin
- 🇺🇸 United States
- builders
- Baldwin Locomotive Works
- operators
- Virginian Railway, Erie Railroad
- top speed
- —
- power
- —
- wheel arrangement
- 2-8-8-8-2
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q17104321, Wikipedia: Triplex locomotive (CC BY-SA 4.0).Updated 2026-10-25.