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- Code Number:
- VRFV07P05_02
- Title:
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Big-Boy, Union Pacific 4004, Alco 4-8-8-4, articulated steam locomotive
- Builder: American Locomotive Company (ALCO)
Build date: 1941 (20), 1944 (5) Total produced: 25 Configuration: 4-8-8-4 UIC classification: (2'D)D2' h4 Gauge: 1,435 mm (4 feet 8 1?2 inches) Leading wheel diameter: 914 mm (36 inches) Career: Union Pacific Railroad Driver diameter: 1,727 mm (68 inches) Trailing wheel diameter: 1,067 mm (42 inches) Wheelbase: 22.09 meters (72 feet 5.5 inches) Locomotive Length: 25.99 meters (85 feet 3.4 inches) Overall: 40.47 meters (132 feet 9 1?4 inches) Width: 3.4 meters (11 feet) Height: 4.94 meters (16 feet 2 1?2 inches) Weight on drivers: 244,939.9 kilograms (540,000 pounds) Locomotive weight: 345,637.4 kilograms (762,000 pounds) Tender weight: 155,219.3 kilograms (342,200 pounds) (2/3 load) Locomotive & tender combined weight: 566,990.5 kilograms (1,250,000 pounds) Fuel type: Coal Fuel capacity: 30 short tons (27.2 tons) Water capacity: 83,000 l (22,000 US gal ; 18,000 imp gal) Boiler: 2,400 mm (95 inches) Boiler pressure: 2.1 MPa (300 lbf/in ) Firegrate area: 14 m2 (150 square feet) Heating surface: Tubes and flues 468 m2 (5,035 square feet) Firebox: 720 67 m2 (square feet) Heating surface: Total 533 m2 (5,735 square feet) Superheater type: Type A Superheater area: 190 m2 (2,043 square feet) Cylinders: Four Cylinder size: 603 813 mm (23.75 32 inches) Top speed: 130 km/h (80 mph) Tractive effort: 602.18 kN (135,375 lbf) Factor of adhesion: 4.11 Class: 4000?4019: 4884-1 4020?4024: 4884-2 Last run: July 21, 1959 Disposition: Eight preserved, remainder scrapped Preserved: 4004, 4005, 4006, 4012, 4014, 4017, 4018, 4023
- Keywords:
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Steam Locomotive, Engine, Steamer, Power, Loco, Vehicle, Freight Train, Railroad, Commerce, Transportation, business, Track, rail, Transport, freightage, hauling, Rail Road, shipment, shipping, transit, Railroadiana, History, Archives, Railfan, Commercial-Shipping, Industry, Industrial, Retro, History
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