#1793
Pennsylvania Railroad class FF1
🇺🇸 United States ·built by Westinghouse Electric Corporation· from 1917· class of 1 American 1′C+C1′ electric locomotive
1 photo from Wikimedia Commons · credits & licences
- 1. PRR FF1: Unknown author Unknown author· Public domain
what is it?
The Pennsylvania Railroad's class FF1 was an American electric locomotive, a prototype numbered #3931 and nicknamed "Big Liz". It was built in 1917 to haul freight trains across the Allegheny Mountains where the PRR planned to electrify. "Big Liz" proved workable but too powerful for the freight cars of the time with its 4,600 hp (3,400 kW) and 140,000 lbf (620 kN) of tractive effort.
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 109 years ago, in 1917.
- 3.4 MW is about 40 family cars (~85 kW each) flat out.
- Weighs about as much as 39 African elephants (~6 t each).
- 23.2 m long: about 5 cars parked nose to tail.
electric locomotive: Draws power from overhead wires or a third rail and pulls separate carriages.
spec sheet
- built
- 1917
- retired
- 1940
- status
- retired
- number built
- 1
- kind
- Electric
- traction
- electric
- origin
- 🇺🇸 United States
- builders
- Westinghouse Electric Corporation, Altoona Works
- operators
- Pennsylvania Railroad
- top speed
- 33 km/h
- power
- 3.4 MW
- gauge
- 1,435 mm standard gauge
- electric system
- 11 kV 25 Hz AC Catenary
- wheel arrangement
- 2-6-0+0-6-2
- length
- 23.2 m
- weight
- 234 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q1485145, Wikipedia: Pennsylvania Railroad class FF1 (CC BY-SA 4.0).Updated 2026-10-25.