Southern Pacific Cab Forward locomotive

E30261

The Southern Pacific Cab Forward locomotive is a distinctive class of steam engines with the cab placed at the front for crew safety, famously used by the Southern Pacific Railroad to haul trains through long, smoky mountain tunnels and snow sheds in the American West.

All labels observed (6)

How this entity was disambiguated

Statements (49)

Predicate Object
instanceOf Mallet-type locomotive
articulated locomotive
cab-forward locomotive
steam locomotive
classificationBySP AC-10
AC-11
AC-12
AC-4
AC-5
AC-6
linked to: AC-5

AC-7
AC-8
AC-9
country United States
designedFor crew safety
operation in long tunnels
operation in snow sheds
eraOfOperation early 20th century
mid 20th century
fuelType oil
historicalSignificance iconic locomotive of Southern Pacific Railroad
unusual cab-forward design rare in world railroading
introducedBy Southern Pacific Railroad mechanical department
notableFeature articulated engine units
boiler located behind cab
cab located at front of locomotive
operator Southern Pacific Railroad
powerType steam
preservedExample Southern Pacific 4294
preservedExampleLocation California State Railroad Museum
primaryRegionOfOperation American West
linked to: Old West

Cascade Range
Sierra Nevada
primaryUse freight service
mountain railroading
railroadLineUsedOn Cascade Line
Donner Pass route
linked to: Donner Pass

Overland Route
Shasta Route
railroadSafetyIssueAddressed asphyxiation risk in tunnels
poor visibility in smoke-filled snow sheds
reasonForFuelChoice oil firing allowed cab-forward arrangement
smokeManagement reduced crew exposure to smoke and fumes
status retired from regular service
successorTractionType diesel-electric locomotive
trackGauge standard gauge
tractionType adhesion
typicalWheelArrangement 2-8-8-4
4-8-8-2

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

California State Railroad Museum notableItem Southern Pacific Cab Forward locomotive
Southern Pacific Cab Forward locomotive preservedExample Southern Pacific 4294
linked to: Southern Pacific Cab Forward locomotive
AC-10 roadNumbers Southern Pacific 4205–4224
linked to: Southern Pacific Cab Forward locomotive
AC-10 family Southern Pacific AC cab-forward series
linked to: Southern Pacific Cab Forward locomotive
AC-4 fleetNumbers Southern Pacific 4100–4109
linked to: Southern Pacific Cab Forward locomotive
AC-5 locomotiveClassFamily Southern Pacific AC cab-forward classes
linked to: Southern Pacific Cab Forward locomotive
AC-8 locomotiveFamily Southern Pacific AC cab-forward series
linked to: Southern Pacific Cab Forward locomotive
AC-12 preservedLocomotive Southern Pacific 4294
linked to: Southern Pacific Cab Forward locomotive
AC-7 belongsToSeries Southern Pacific AC cab-forward classes
linked to: Southern Pacific Cab Forward locomotive