Santa Fe class 5011

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

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.

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:

• #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