Southern Pacific AC-7
E654924
The Southern Pacific AC-7 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, notable for hauling heavy freight over steep mountain grades in the early 20th century.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
articulated locomotive class
ⓘ
steam locomotive class ⓘ |
| articulationType | Mallet-type articulated ⓘ |
| brakeType | air brakes ⓘ |
| builder | Baldwin Locomotive Works NERFINISHED ⓘ |
| category |
4-8-8-2 locomotives
ⓘ
Southern Pacific Railroad locomotives ⓘ articulated steam locomotives ⓘ oil-fired steam locomotives ⓘ |
| configuration | 4-8-8-2 ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | compound articulated ⓘ |
| cylinderCount | 4 ⓘ |
| designer | Southern Pacific Railroad NERFINISHED ⓘ |
| era | early 20th century ⓘ |
| family | Southern Pacific AC cab-forward series NERFINISHED ⓘ |
| fleetNumbers | 4151–4164 ⓘ |
| followedBy | Southern Pacific AC-8 NERFINISHED ⓘ |
| fuelType | fuel oil ⓘ |
| gauge | standard gauge ⓘ |
| introduced | late 1930s ⓘ |
| notableFor |
cab-forward design
ⓘ
hauling heavy freight over steep mountain grades ⓘ use in long mountain tunnels and snow sheds ⓘ |
| numberInClass | 14 locomotives ⓘ |
| operatedOn |
Southern Pacific Overland Route
NERFINISHED
ⓘ
Southern Pacific Shasta Route NERFINISHED ⓘ |
| operator | Southern Pacific Railroad NERFINISHED ⓘ |
| powerType | steam ⓘ |
| precededBy | Southern Pacific AC-6 NERFINISHED ⓘ |
| preservedUnits | none ⓘ |
| primaryUse |
freight service
ⓘ
heavy freight ⓘ |
| railwayCompany | Southern Pacific Railroad NERFINISHED ⓘ |
| railwayRegion | Western United States NERFINISHED ⓘ |
| region | Pacific Coast NERFINISHED ⓘ |
| retired | mid-1950s ⓘ |
| serviceRole | mountain freight locomotive ⓘ |
| serviceType | freight only ⓘ |
| status | all scrapped ⓘ |
| trackGauge | 4 ft 8 1⁄2 in ⓘ |
| trainHeating | none ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| usedOn |
Cascade Range routes
ⓘ
Sierra Nevada routes ⓘ |
| wheelArrangement | 4-8-8-2 ⓘ |
| whyCabForward | to keep crew ahead of smoke in tunnels and snow sheds ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.