Friday Night Steam

Big Boy time!!

When 4014's restoration is completed, the engine will join the railroad's never-retired 4-8-4 #844 and the 4-6-6-4 Challenger #3985 in excursion service and will officially be "the world's largest operational steam locomotive," displacing the 3985^. Union Pacific hopes to return the Big Boy 4014 to active excursion service between 2017 to 2019. The restoration includes a plan to convert the locomotive to oil firing. Plans for operating the locomotive include the celebration of the 150th anniversary of the completion of the transcontinental railroad in May 2019 and the 4-8-8-4's 75th anniversary as well.

Union Pacific 4014

Union Pacific "Big Boy" Number 4014 on static display at the RailGiants Train Museum in Pomona, California

[hide]Type and origin References:[1] Power type Steam Builder American Locomotive Company Serial number 65572 Build date September 1941

[hide]Specifications Configuration 4-8-8-4 UIC class (2′D)D2′ h4 Gauge 4 ft 8 1⁄2 in (1,435 mm) Leading dia. 36 in (914 mm) Driver dia. 68 inches (170 cm) Trailing dia. 42 in (1,067 mm) Wheelbase 72 ft 5.5 in (22.09 m) Length Locomotive: 85 ft 7.8 in (26.11 m) Overall: 132 ft 9 7⁄8 in (40.48 m) Width 11 ft (3.4 m) Height 16 ft 2 1⁄2 in (4.94 m) Adhesive weight 540,000 lb (244,940 kilograms) Loco weight 762,000 lb (345,637 kilograms) Tender weight 342,200 lb (155,219 kilograms) (2/3 load) Loco & tender weight 1,250,000 lb (566,990 kilograms) Fuel type Coal Fuel capacity 28 short tons (25.4 t; 25.0 long tons) Water cap 24,000 US gal (91,000 l; 20,000 imp gal) Firebox:  • Firegrate area 150 sq ft (14 m2) Boiler 95 in (2,400 mm) Boiler pressure 300 lbf/in2 (2.1 MPa) Heating surface 5,735 sq ft (533 m2)  • Tubes and flues 5,035 sq ft (468 m2)  • Firebox 720 sq ft (67 m2) Superheater Type A  • Heating area 2,043 sq ft (190 m2) Cylinders 4 Cylinder size 23.75 in × 32 in (603 mm × 813 mm)

[hide]Performance figures Maximum speed 80 mph (130 km/h) Power output 6,290 hp (4,690 kW) Tractive effort 135,375 lbf (602.18 kN) Factor of adh 4.11

[hide]Career Operators Union Pacific Railroad Numbers 4014 Nicknames Big Boy Last run July 21, 1959 Retired December 7, 1961 Restored Commenced August 2013 Current owner Union Pacific Railroad Disposition Undergoing restoration for excursion service, and will be based on Cheyenne, Wyoming, in roundhouse once restoration is completed

Restoration includes conversion from coal to no. 5 oil.