Santa Fe 5011 class
#5017 at the National Railroad Museum next to Milwaukee Road 261 in 1970
Type and origin
Power typeSteam
BuilderBaldwin Locomotive Works
Serial number70817-70841
Build date1944
Total produced25
Specifications
Configuration:
​
 • Whyte2-10-4
 • UIC1′E2′ h2
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.74 in (1,880 mm)
WheelbaseLoco & tender: 98.64 ft (30.07 m)
Length123 ft 5 in (37.62 m)
Height16 ft 0 in (4.88 m)
Axle load76,060 lb (34,500 kilograms; 34.50 metric tons)
Adhesive weight380,300 lb (172,500 kilograms; 172.5 metric tons)
Loco weight538,000 lb (244,000 kilograms; 244 metric tons)
Tender weight464,700 lb (210,800 kilograms; 210.8 metric tons)
Total weight1,002,700 lb (454,800 kilograms; 454.8 metric tons)
Fuel typeFuel oil
Fuel capacity7,000 US gal (26,000 L; 5,800 imp gal)
Water cap.24,500 US gal (93,000 L; 20,400 imp gal)
Firebox:​
 • Grate area121.70 sq ft (11.306 m2)
Boiler104 in (2,642 mm)
Boiler pressure310 lbf/in2 (2.14 MPa)
Heating surface:​
 • Firebox494 sq ft (45.9 m2)
Superheater:
​
 • Heating area2,640 sq ft (245 m2)
CylindersTwo
Cylinder size30 in × 34 in (762 mm × 864 mm)
Valve gearWalschaert
Performance figures
Maximum speed70 mph (110 km/h)
Power output5,660 hp (4,220 kW) @ 40 mph (64 km/h) (drawbar)
Tractive effort93,000 lbf (413.68 kN)
Factor of adh.4.06
Career
OperatorsSanta Fe
Class5011
Numbers5011–5035
Retired1950-1959
PreservedFour (Nos. 5011, 5017, 5021 and 5030) preserved
Scrapped1953-1963
DispositionNos. 5011, 5017, 5021 and 5030 on display, remainder scrapped

The Atchison, Topeka and Santa Fe Railway class 5011 was the last class of steam locomotives to be purchased by AT&SF. The class was introduced by Baldwin Locomotive Works in 1944.

History

A total of 25 of these large engines were built. They were nicknamed "War Babies" by the AT&SF from being built and used during World War II.

The AT&SF ran the class from the mid-1940s to the mid-late 1950s. Despite being mainly freight haulers, their driving wheels were unusually tall for a "Texas" type, which led to them also being successful in passenger service.[1]

Specifications

Numbers 5011 to 5035, when built, were the largest and fastest class of "Texas"-type locomotives ever built and equipped with Timken roller bearings on every axle.

The engines had a maximum output of 5,600 horsepower (4,200 kW) measured at the rear of the tender, at a top speed of 70 miles per hour (110 km/h).

Present day

#5011 at the National Museum of Transportation in 2004

Four of the class 5011 locomotives were preserved by the AT&SF for museums, with the remainder being scrapped.

The four preserved locomotives are:

See also

  • Steam locomotives of the United States
  • Atchison, Topeka and Santa Fe Railway locomotives
  • Baldwin locomotives

References

  1. ↑ "Atchison, Topeka & Santa Fe 2-10-4 "Texas" Locomotives in the USA".
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