Southern Pacific AC-11
E650375
The Southern Pacific AC-11 was a class of massive articulated cab-forward steam locomotives used by the Southern Pacific Railroad, primarily designed for heavy freight service over steep mountain grades.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
articulated locomotive class
ⓘ
steam locomotive class ⓘ |
| brakeType | air brakes ⓘ |
| buildDate |
1942
ⓘ
1943 ⓘ |
| builder | Baldwin Locomotive Works NERFINISHED ⓘ |
| category |
4-8-8-2 locomotives
ⓘ
Southern Pacific Railroad locomotives NERFINISHED ⓘ articulated steam locomotives ⓘ cab-forward steam locomotives ⓘ oil-fired steam locomotives ⓘ |
| configuration | 4-8-8-2 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | simple articulated ⓘ |
| cylinderCount | 4 ⓘ |
| designer | Southern Pacific Railroad NERFINISHED ⓘ |
| fuelType | bunker oil ⓘ |
| gauge | 4 ft 8 1⁄2 in (1,435 mm) ⓘ |
| notableFeature |
articulated frame
ⓘ
cab-forward design ⓘ designed for long tunnels and snow sheds ⓘ |
| operatorRegion |
Cascade Range
NERFINISHED
ⓘ
Sierra Nevada NERFINISHED ⓘ U.S. West Coast NERFINISHED ⓘ United States NERFINISHED ⓘ |
| powerType | steam ⓘ |
| precededByClass | Southern Pacific AC-10 NERFINISHED ⓘ |
| preservedUnits | 0 ⓘ |
| primaryRole | heavy freight service ⓘ |
| primaryRouteType | mountain grades ⓘ |
| railwayCompany | Southern Pacific Transportation Company NERFINISHED ⓘ |
| railwayOperator | Southern Pacific Railroad NERFINISHED ⓘ |
| retirementPeriod | 1950s ⓘ |
| roadNumberRange |
SP 4245
NERFINISHED
ⓘ
SP 4274 NERFINISHED ⓘ |
| status | all units scrapped ⓘ |
| successorClass | Southern Pacific AC-12 NERFINISHED ⓘ |
| totalProduced | 30 ⓘ |
| traction | adhesion ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| usedFor |
freight trains over Cascade Line
ⓘ
freight trains over Donner Pass ⓘ |
| valveGear | Walschaerts NERFINISHED ⓘ |
| whyCabForward | to keep crew ahead of smoke in tunnels and snow sheds ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.