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Union Pacific 4005
Union Pacific 4005 at the Forney Transportation Museum in Denver, Colorado.
Type and origin Reference: Power type Steam Designer Otto Jabelmann Builder American Locomotive Company (ALCO) Build date 1941
Specifications Configuration: ​  • Whyte 4-8-8-4  • UIC (2′D)D2′ h4g Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 36 in (914 mm) Driver dia. 68 in (1,727 mm) Trailing dia. 42 in (1,067 mm) Minimum curve 288 ft (88 m) radius/ 20° Wheelbase Locomotive: 72 ft 5+1⁄2 in (22.09 m) Overall: 117 ft 7 in (35.84 m) Length Locomotive: 85 ft 3+2⁄5 in (25.99 m) Overall: 132 ft 9+1⁄4 in (40.47 m) Width 11 ft (3.35 m) Height 16 ft 2+1⁄2 in (4.94 m) Axle load 67,500 lb Adhesive weight 540,000 lb Loco weight 762,000 lb Tender weight 427,500 lb Total weight 1,189,500 lb Fuel type Coal No. 5 fuel oil (experimentally) Fuel capacity 28 short tons (25.4 t; 25.0 long tons) Water cap. 24,000 US gal Fuel consumption Up to 11 short tons of coal / hr Up to 12,000 US gal of water / hr Firebox: ​  • Grate area 150 sq ft (14 m) Boiler 107 in (2,718 mm) (OD) Boiler pressure 300 lbf/in (2.1 MPa) Feedwater heater Elesco Type T.P. 502 Exhaust Steam Injector 14,000 US gal/hr capacity Heating surface: ​  • Firebox 704 sq ft (65 m)  • Tubes 967 sq ft (90 m)  • Flues 4,218 sq ft (392 m)  • Tubes and flues 5,185 sq ft (482 m)  • Total surface 5,889 sq ft (547 m) Superheater: ​  • Type Type E  • Heating area 2,466 sq ft (229 m) (Type E) 2,043 sq ft (190 m) (Type A) Cylinders 4 Cylinder size 23.75 in × 32 in (603 mm × 813 mm) Valve gear Walschaerts Valve type Piston valves Valve travel 7 in (178 mm) Valve lap 1+3⁄8 in (35 mm) Valve lead 1⁄4 in (6 mm) Train heating Steam heat Loco brake Pneumatic, Schedule 8-ET Train brakes Pneumatic Safety systems Cab signals
Performance figures Maximum speed 80 mph (130 km/h) Power output 5,500–6,290 hp (4,100–4,690 kW) @ 41 mph (66 km/h) (drawbar) Tractive effort 135,375 lbf (602.18 kN) Factor of adh. 3.99
Career Operators Union Pacific Railroad Class 4884-1 Numbers 4005 Retired 1962 Current owner Forney Museum of Transportation Disposition On static display
Cost to build US$ 265,000 in 1941, equivalent to $5,489,457 in 2023

Union Pacific 4005 is a 4-8-8-4 "Big Boy" type steam locomotive built by the American Locomotive Company for the Union Pacific Railroad in 1941. It was assigned to haul heavy freight trains in the Wasatch mountain range.

History

Construction and delivery

Union Pacific 4005 was constructed in 1941 by the American Locomotive Company and it was delivered to the Union Pacific Railroad that same year in 1941 as one of 20 members of the 1941 batch of Union Pacific Big Boys or better known as the class 4884-1.

Oil conversion experiment

No. 4005 was selected to be converted to burn oil in 1946. Unlike a similar effort with the Challengers, the conversion failed due to uneven heating in the Big Boy's large, single-burner firebox. The locomotive was converted back to coal in 1948. (But decades later, No. 4014 would be successfully converted to oil during its restoration.)

Accident

On April 27, 1953, No. 4005 was pulling a freight train through southern Wyoming when it jumped a switch track at 50 mph (80 km/h), throwing the engine onto its left side and derailing its tender and the first 18 freight cars of its 62-car train. The engineer and fireman were killed on impact; the brakeman died of severe burns in a hospital a few days later. The tender destroyed the cab of the locomotive, and the loads from the 18 derailed cars were scattered. The locomotive was repaired by Union Pacific at its Cheyenne facility and returned to service until 1962.

Retirement and preservation

No. 4005 was retired from active service on the Union Pacific Railroad in 1962 when the Union Pacific Railroad had replaced steam locomotives with diesel locomotives and was donated to the Forney Museum of Transportation in Denver, Colorado in June 1970 and placed on static display at the museum.

References

1. Peck, Combes & Augur 1950, pp. 501, 519, 523, 545.
2. ^ Kratville (1963), p. 59
3. ^ Frank, Al. "Big Boy". Forney Museum of Transportation. Archived from the original on December 10, 2018. Retrieved July 27, 2019.
4. Wrinn, Jim (February 15, 2018). "Where to find Big Boy locomotives". Trains. Archived from the original on September 28, 2018. Retrieved June 16, 2019.
5. "Big Boy No. 4014". Union Pacific. Archived from the original on May 17, 2019. Retrieved June 5, 2019.
6. "DISASTER ON THE RAILS: The Wreck of the 4005". Forney Museum of Transportation. Archived from the original on September 24, 2018. Retrieved June 14, 2019.
7. "Big Boy 4005 Wreck". www.forneymuseum.org. Retrieved 2023-10-31.
8. "Forney Museum Homepage". Retrieved July 10, 2023.
9. King, Kat (September 4, 2009). "The Forney Museum is worth getting around to". The Denver Post. Archived from the original on July 27, 2019. Retrieved July 27, 2019.

See also

• Union Pacific 4014

Further reading

• Kratville, William W. (1963). Big Boy. Barnhart Press.
• Peck, C. B.; Combes, C. L.; et al., eds. (1950). 1950-52 Locomotive Cyclopedia of American Practice (Fourteenth ed.). New York: Simmons-Boardman.

• Union Pacific Railroad locomotives
• Locomotives
• Preserved steam locomotives
• Steam locomotives
• Articulated locomotives
• 4-8-8-4 locomotives
• ALCO locomotives
• Union Pacific Railroad
• Railway locomotives introduced in 1941