#2946
ACMU
🇺🇸 United States ·built by St. Louis Car Company· from 1950· class of American Air-Conditioned electric Multiple Unit
3 photos from Wikimedia Commons · credits & licences
- 1. MNRR ACMU-1100-NWP: Sturmovik at English Wikipedia· CC BY-SA 3.0
- 2. ACMU at Danbury Railway Museum: TriStateGuy· CC BY 4.0
- 3. MNRR ACMU-Interrior-2: Sturmovik at English Wikipedia· CC BY-SA 3.0
what is it?
The ACMUs (short for Air Conditioned Multiple Unit) were a series of electric multiple unit railcars built for the New York Central Railroad in three orders between 1950 and 1965. The ACMUs were intended to replace/supplement the original fleet of heavyweight MU cars, some of which dated to the start of electric operations on the New York Central. These were the first New York Central units to offer air conditioning, with sealed windows replacing the drop sash and clerestory types found on earlier cars.
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 76 years ago, in 1950.
- Weighs about as much as 9 African elephants (~6 t each).
- 25.9 m long: about 6 cars parked nose to tail.
- Seats 130: 3 full city buses (~50 seats each).
- Served for 54 years (1950–2004).
multiple unit: A self-propelled train: motors are spread under the passenger cars, so no separate locomotive.
spec sheet
- built
- 1950
- in service from
- 1950
- retired
- 2004
- status
- retired
- number built
- 217
- kind
- multiple unit
- traction
- electric
- origin
- 🇺🇸 United States
- builders
- St. Louis Car Company, Pullman Company, Pullman-Standard Car Manufacturing Company
- operators
- New York Central Railroad, Penn Central Transportation Company, Conrail, Metro-North Railroad, Long Island Rail Road
- top speed
- 129 km/h
- power
- 298 kW
- electric system
- 660 V DC third rail
- formation
- Single unit
- length
- 25.9 m
- weight
- 51.7 t
- capacity
- 130 passengers
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q4650714, Wikipedia: ACMU (CC BY-SA 4.0).Updated 2026-10-25.