Santa Fe class 5011

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.

Santa Fe 5011 class
#5017 at the National Railroad Museum next to Milwaukee Road 261 in 1970
Type and origin Power type Steam Builder Baldwin Locomotive Works Serial number 70817-70841 Build date 1944 Total produced 25
Specifications Configuration: ​  • Whyte 2-10-4  • UIC 1′E2′ h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 74 in (1,880 mm) Wheelbase Loco & tender: 98.64 ft (30.07 m) Length 123 ft 5 in (37.62 m) Height 16 ft 0 in (4.88 m) Axle load 76,060 lb (34,500 kilograms; 34.50 metric tons) Adhesive weight 380,300 lb (172,500 kilograms; 172.5 metric tons) Loco weight 538,000 lb (244,000 kilograms; 244 metric tons) Tender weight 464,700 lb (210,800 kilograms; 210.8 metric tons) Total weight 1,002,700 lb (454,800 kilograms; 454.8 metric tons) Fuel type Fuel oil Fuel capacity 7,000 US gal (26,000 L; 5,800 imp gal) Water cap. 24,500 US gal (93,000 L; 20,400 imp gal) Firebox: ​  • Grate area 121.70 sq ft (11.306 m2) Boiler 104 in (2,642 mm) Boiler pressure 310 lbf/in2 (2.14 MPa) Heating surface: ​  • Firebox 494 sq ft (45.9 m2) Superheater: ​  • Heating area 2,640 sq ft (245 m2) Cylinders Two Cylinder size 30 in × 34 in (762 mm × 864 mm) Valve gear Walschaert
Performance figures Maximum speed 70 mph (110 km/h) Power output 5,660 hp (4,220 kW) @ 40 mph (64 km/h) (drawbar) Tractive effort 93,000 lbf (413.68 kN) Factor of adh. 4.06
Career Operators Santa Fe Class 5011 Numbers 5011–5035 Retired 1950-1959 Preserved Four (Nos. 5011, 5017, 5021 and 5030) preserved Scrapped 1953-1963 Disposition Nos. 5011, 5017, 5021 and 5030 on display, remainder scrapped

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.

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).

Santa Fe 5021 on the Sacramento Southern, adjacent to the California State Railroad Museum

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:

• #5011 — at the National Museum of Transportation, Kirkwood, Missouri.
• #5017 — at the National Railroad Museum, Green Bay, Wisconsin
• #5021 — at the California State Railroad Museum, Sacramento, California.
• #5030 — at Salvador Perez Park, in Santa Fe, New Mexico.

See also

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