#2328
ALCO HH series
🇺🇸 United States ·built by American Locomotive Company· from 1931· American locomotive series (1931–1940)
1 photo from Wikimedia Commons · credits & licences
- 1. PTM1004: Thewellman at en.wikipedia· Public domain
what is it?
The ALCO HH series was an early set of diesel switcher locomotives built by the American Locomotive Company (ALCO) of Schenectady, New York between 1931 and 1940, when they were replaced by the S series: the 660 hp (490 kW) S-1 and 1,000 hp (750 kW) S-2. They were ALCO's first diesel switchers to enter true series production, and among the first land vehicles anywhere to use the revolutionary diesel-electric power transmission. The "HH" name stood for "High Hood", a name ALCO came eventually to use in an official context, but originally an unofficial name.
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 95 years ago, in 1931.
- 746 kW is about 9 family cars (~85 kW each) flat out.
- 13.7 m long: about 3 cars parked nose to tail.
diesel locomotive: A diesel engine on board drives the wheels, usually through a generator (diesel-electric).
spec sheet
- built
- 1931–1940
- status
- preserved
- number built
- 177
- kind
- Diesel-electric
- traction
- diesel
- origin
- 🇺🇸 United States
- builders
- American Locomotive Company
- top speed
- —
- power
- 746 kW
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- B-B
- length
- 13.7 m
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q4652280, Wikipedia: ALCO HH series (CC BY-SA 4.0).Updated 2026-10-25.