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When Will the Big Boy Train Be in Utah Again

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Class of 25 American simple articulated four-8-8-four locomotives

Union Pacific Big Boy
2021-08-13 Big Boy 4014.jpg

Spousal relationship Pacific 4014 passes through Denton, Texas, on Baronial thirteen, 2021
Blazon and origin
Reference:[1]
Power type Steam
Builder American Locomotive Company
Build date 1941 and 1944
Total produced 25
Specifications
Configuration:
 ​
 • Whyte 4-8-8-4
 • UIC (two′D)D2′ h4
Approximate four ft8+ 1⁄2  in (one,435 mm) standard gauge
Leading dia. 36 in (914 mm)
Driver dia. 68 in (1,727 mm)
Trailing dia. 42 in (1,067 mm)
Wheelbase
  • Locomotive: 72 ft five+ 1⁄2  in (22.09 yard)
  • Overall: 117 ft seven in (35.84 yard)
Length Locomotive: 85 ft 3+ 2⁄5  in (25.99 m)
Overall: 132 ft 9+ ane⁄iv  in (40.47 chiliad)
Width 11 ft (3.35 chiliad)
Height 16 ft 2+ 1⁄2  in (4.94 g)
Beam load 4884-1: 67,500 lb (30,600 kg)
4884-2: 68,150 lb (30,900 kg)
Adhesive weight 4884-1: 540,000 lb
(245,000 kg)
4884-2: 545,200 lb
(247,000 kg)
Loco weight 4884-one: 762,000 lb
(346,000 kg)
4884-2: 772,250 lb
(350,000 kg)
Tender weight 4884-one: 427,500 lb
(193,910 kg)
4884-2: 436,500 lb
(198,000 kg)
Total weight 4884-1: i,189,500 lb
(539,500 kg)
4884-ii: one,208,750 lb
(548,300 kg)
Fuel type Coal (No. 4014 converted to No. five fuel oil)
Fuel capacity 28 short tons
(25.4 t; 25.0 long tons)
Water cap. 4884-1: 24,000 The states gal
(91,000 fifty; xx,000 imp gal)
4884-2: 25,000 US gal (95,000 l; 21,000 imp gal)
Fuel consumption Up to 11 t (11 long tons; 12 short tons) of coal per hour
Up to 12,000 US gal (45,000 l; 10,000 imp gal) of water per hour
Firebox:
 • Firegrate area		 150 sq ft (14 m2)
Banality 95 in (2,413 mm)
Boiler pressure 300 lbf/inii (2.1 MPa)
Feedwater heater Elesco TP400 Frazzle Steam Injector
Heating surface 5,889 sq ft (547 one thousand2) (4884-1)
5,735 sq ft (533 k2) (4884-2)
 • Tubes 967 sq ft (90 thouii) (4884-one)
2,734 sq ft (254 k2) (4884-2)
 • Flues 4,218 sq ft (392 g2) (4884-1)
ii,301 sq ft (214 m2) (4884-two)
 • Tubes and flues 5,185 sq ft (482 mtwo) (4884-1)
5,035 sq ft (468 grand2) (4884-2)
 • Firebox 704 sq ft (65 m2) (4884-1)
720 sq ft (67 grand2) (4884-2)
Superheater:
 ​
 • Type Type E (4884-i)
Blazon A (4884-2)
 • Heating surface area 2,466 sq ft (229 m2) (Blazon E)
2,043 sq ft (190 grand2) (Blazon A)
Cylinders 4
Cylinder size 23.75 in × 32 in
(603 mm × 813 mm)
Valve gear Walschaerts
Valve type Piston
Valve travel 7 in (178 mm)
Valve lap 1+ 3⁄viii  in (35 mm)
Valve lead ane⁄four  in (6 mm)
Train heating Steam heat
Loco brake Pneumatic, Schedule viii-ET
Train brakes Pneumatic
Safety systems Cab signals
Performance figures
Maximum speed fourscore mph (130 km/h)
Power output 5,500–6,290 hp (four,100–4,690 kW) @ 41 mph (Drawbar)
Tractive effort 135,375 lbf (602.18 kN)
Factor of adh. iii.99 (4884-1)
iv.02 (4884-ii)
Career
Operators Spousal relationship Pacific Railroad
Class 4884-1, 4884-ii
Numbers 4000-4019 (-1)
4020-4024 (-2)
Last run June 21, 1959 (revenue service)
Retired 1959–1962
Preserved Viii (Nos. 4004, 4005, 4006, 4012, 4014, 4017, 4018 and 4023) preserved, balance scrapped
Restored No. 4014; May one, 2019
Disposition Seven on brandish and one (No. 4014) operational in excursion service
Toll to build U.s.a.$ 265,000 in 1941, equivalent to $4,662,681 in 2020

The Marriage Pacific Large Boy is a type of simple articulated 4-8-viii-4 steam locomotive manufactured past the American Locomotive Visitor (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962.

The 25 Large Boy locomotives were built to haul freight over the Wasatch mountains betwixt Ogden, Utah and Greenish River, Wyoming. In the tardily 1940s, they were reassigned to Cheyenne, Wyoming, where they hauled freight over Sherman Colina to Laramie, Wyoming. They were the just locomotives to use a four-viii-8-4 wheel arrangement: four-wheel leading truck for stability entering curves, 2 sets of viii driving wheels and a four-wheel trailing truck to back up the large firebox.

Today, eight Big Boys survive, with most on static display at museums across the country. One of them, No. 4014, was re-acquired by Union Pacific and rebuilt to operating status from 2014 to 2019 for the 150th anniversary of the Commencement transcontinental railroad, regaining the title as the largest and most powerful operating steam locomotive in the earth.

History [edit]

Design [edit]

In 1936, Marriage Pacific introduced the Challenger-blazon (four-6-6-four) locomotives on its main line over the Wasatch Range between Greenish River and Ogden.[2] [3] For most of the route, the maximum grade is 0.82% in either direction, but the climb due east from Ogden, into the Wasatch Range, reached i.xiv%.[4] Hauling a 3,600-curt-ton (3,300 t; 3,200-long-ton) freight train demanded double heading and helper operations, which slowed service.[three] [iv] Then Union Pacific decided to design a new locomotive that could handle the run by itself:[v] faster and more than powerful than the chemical compound 2-viii-8-0s that UP tried later on World War I, able to pull long trains at a sustained speed of threescore miles per hr (100 km/h) once past mountain grades.[v]

A Union Pacific design squad led by Otto Jabelmann, the head of the Research and Mechanical Standards section of the Wedlock Pacific'southward Mechanical Department, worked with ALCO (the American Locomotive Company) to re-examine their Challenger locomotives.[vi] The team found that the railroad'southward goals could be accomplished by enlarging the Challenger firebox to about 235 by 96 inches (5.97 chiliad × 2.44 yard) (near 150 sq ft or 14 m2), increasing boiler pressure to 300 psi, adding four driving wheels, and reducing the size of the driving wheels from 69 to 68 in (1,753 to 1,727 mm).[half-dozen] The new locomotive was carefully designed not to exceed an axle loading of 67,800 lb (30,800 kg), and achieved the maximum possible starting tractive endeavour with a factor of adhesion of 4.0.[4] [6] Information technology was designed to travel smoothly and safely at 80 miles per hr.[7]

To achieve these new engineering goals, the Challenger locomotive was "comprehensively redesigned from first principles," wrote locomotive historian Tom Morrison.[viii] The overall pattern simplified some aspects of previous locomotive designs and added complexity elsewhere. Compounding, booster, and feed h2o heaters were eliminated, as were Baker valve gear and limited cutting-off. But the "proliferation of valves and gauges on the backhead showed that running a Large Boy was an birthday more than complicated and demanding task for the coiffure than running previous existing locomotives," Morrison wrote.[8]

UP 4000, the first of the class

The 4-viii-eight-4 class series, originally rumored to be called the "Wasatch", subsequently the Wasatch Mountains, acquired its nickname after an unknown ALCO worker scrawled "Big Boy" in chalk on the front of No. 4000, then under structure as the first of its class.[four] [v] [9]

The Big Boys were articulated, like the Mallet locomotive design, though lacking the compounding of the Mallet.[10] They were built with a wide margin of reliability and safety, and usually operated well beneath 60 miles per hour (100 km/h) in freight service. Peak drawbar horsepower was reached at near 41 mph (66 km/h).[11] The maximum drawbar pull measured during 1943 tests was 138,200 lbf (615,000 N) while starting a train.[11]

The Big Boy has the longest engine torso of any reciprocating steam locomotive, longer than two buses.[12] They were also the heaviest reciprocating steam locomotives ever congenital, the combined weight of the 772,250 lb (350,290 kg) engine and 436,500 lb (198,000 kg) tender outweighed a Boeing 747.[12] There was some speculation that the commencement series of Chesapeake and Ohio 2-vi-6-vi "Allegheny" locomotives, built by the Lima Locomotive Works in 1941, may take weighed as much as 778,200 lb (353,000 kg), exceeding the Big Boys, but subsequent re-weighs of early-production H8s, nether shut scrutiny by the builder and the railroad, found them to be less than 772,250 lb (350,290 kg).[xiii] [14]

Structure [edit]

The American Locomotive Visitor manufactured 25 Big Boy locomotives for Union Pacific: twenty in 1941 and five in 1944.[4] [9] Along with the Challengers, the Big Boys arrived on the scene just as traffic was surging in grooming for American participation in World War II.

Table of orders and numbers[15]
Class Quantity Serial Nos. Year built Upwards No. Notes
4884-ane twenty 69571-69590 1941 4000-4019 No. 4005 converted to oil fuel in 1946 and reverted to coal in 1948.[xvi] No. 4019 given experimental fume deflectors from 1944 to 1945.[17] No. 4014 in excursion service since May 2019.[18]
4884-2 v 72777–72781 1944 4020-4024

Operation [edit]

The Large Boy locomotives had large grates to burn the low-quality bituminous coal supplied by Union Pacific-owned mines in Wyoming. Coal was carried from the tender to the firebox by a stoker motor, a steam engine driving an auger.

As an experiment, No. 4005 was converted to burn oil in 1946.[19] Unlike a similar effort with the Challengers, the conversion failed due to uneven heating in the Big Boy's large, single-burner firebox.[19] The locomotive was converted back to coal firing in 1948.[16] [19] (Decades later, No. 4014 would be successfully converted to oil during its restoration.[18]) Another short-term experiment was the fitting of smoke deflectors on locomotive 4019, similar to those plant on the railroad'due south FEF Serial, as well as some of their Challengers. These were later removed, equally the Big Boys' nozzle and blower in the smoke box could blow fume high enough to keep engineers' lines of sight clear.

Big Male child #4019 near Echo Canyon, Utah. Date of photo unknown.

The locomotives were held in loftier regard by crews, who found them sure-footed and more "user friendly" than other motive power. They were capable machines; their rated hauling tonnage was increased several times over the years. But postwar increases in the price of coal and labor, along with the advent of efficient, cost-effective diesel fuel-electric power, spelled the end of their operational lives. Still, they were among the concluding steam locomotives withdrawn from service on the Union Pacific. The last revenue train hauled past a Large Boy ended its run early in the morning on July 21, 1959. Nigh were stored operational until 1961 and iv remained in operational condition at Green River, Wyoming until 1962. Their duties were assumed by diesel locomotives and gas turbine-electric locomotives.[20]

In 2019, Union Pacific completed the restoration of No. 4014 and placed it in excursion service.[21] [22] The locomotive was sent on a bout in celebration of the 150th ceremony of the completion of the First Transcontinental Railroad.[23] [24]

Accidents and incidents [edit]

  • 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 kickoff xviii freight cars of its 62-car railroad train. The engineer and fireman were killed on impact; the brakeman died of astringent 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. Despite the heavy damage, the locomotive was repaired by Union Pacific at its Cheyenne facility and returned to service until 1962.[25]
  • On May xvi, 2019, No. 4014 partially derailed, with 2 axles from one set of drive wheels falling into the gauge, while entering the 1000 at Rawlins, Wyoming;[26] the derailed drive wheels were returned to the track within three hours.[27]

Preservation [edit]

Near of the 25 Big Boys were scrapped, but seven remain on static display—two indoors and five outdoors, under the elements—and an 8th, Union Pacific 4014, was rebuilt to operating condition by Union Pacific'due south steam program.[xvi]

See also [edit]

  • Union Pacific Challenger
  • Union Pacific FEF Serial
  • Union Pacific heritage armada
  • EAR 59 grade The world'southward largest metre-gauge steam locomotive: East African Railways 4-8-2+2-8-four Beyer-Garratt

Notes and references [edit]

Citations [edit]

  1. ^ Peck, Combes & Augur 1950, pp. 501, 519, 523, 545.
  2. ^ "Challenger No. 3985". Union Pacific. Archived from the original on May ane, 2019. Retrieved May 23, 2019.
  3. ^ a b Solomon 2009, p. 70.
  4. ^ a b c d e Glischinski, Steve (August 21, 2013). "Big Boy story began in 1940". Trains. Archived from the original on June 24, 2018. Retrieved July 11, 2019.
  5. ^ a b c Welsh, Joe; Boyd, Jim; Howes Jr., William F. (2006). The American Railroad: Working for the Nation (1st ed.). MBI Publishing. p. 104. ISBN978-0-7603-1631-three.
  6. ^ a b c Vantuono, William C. (July 9, 2019). "Railway Historic period, October 4, 1941: UP's "Large Male child" debuts". Railway Age. Archived from the original on July eleven, 2019. Retrieved July 11, 2019.
  7. ^ Elliott, Dan (April xv, 2014). "Huge Big Boy steam locomotive coming back to life". Yahoo! News. Associated Press. Retrieved April 15, 2014.
  8. ^ a b Morrison, Tom (2018-07-x). The American Steam Locomotive in the Twentieth Century. McFarland. ISBN9781476627939.
  9. ^ a b Solomon 2009, p. 75.
  10. ^ Morrison, Tom (2018). The American Steam Locomotive in the Twentieth Century (1st ed.). McFarland & Visitor. pp. 533–534. ISBN978-1-4766-6582-five.
  11. ^ a b Kratville, William (1972). Big Boy. Kratville Publications.
  12. ^ a b Gruver, Mead (May 8, 2019). "Refurbished 'Big Boy' locomotive weighs more than than a Boeing 747". The Associated Press. United states Today. Archived from the original on June 8, 2019. Retrieved June 12, 2019.
  13. ^ Solomon, Brian (2000). Union Pacific Railroad. Railroad Color History (1st ed.). Voyageur Press. p. 104. ISBN0-7603-0756-3.
  14. ^ King, Ed (February xv, 2018). "Large Boy versus Allegheny". Trains. Archived from the original on September 28, 2018. Retrieved July 11, 2019.
  15. ^ a b Drury 2015, p. 319.
  16. ^ a b c d e f grand Wrinn, Jim (February 15, 2018). "Where to find Big Boy locomotives". Trains. Archived from the original on September 28, 2018. Retrieved June sixteen, 2019.
  17. ^ "Marklin 37994 Union Pacific "Large Boy" Steam Loco". Trainz.com. Archived from the original on July 11, 2019. Retrieved July 11, 2019.
  18. ^ a b c "Big Boy No. 4014". Union Pacific. Archived from the original on May 17, 2019. Retrieved June 5, 2019.
  19. ^ a b c d Frank, Al. "Big Male child". Forney Museum of Transportation. Archived from the original on December 10, 2018. Retrieved July 27, 2019.
  20. ^ Klein, Maury (2006). Wedlock Pacific: Volume II, 1894-1969 (2d ed.). University of Minnesota Press. p. 479. ISBN978-0-8166-4460-five.
  21. ^ Scott, Ramsey (May iv, 2019). "The Big Male child leaves the store and heads into history". Wyoming Tribune Eagle. Archived from the original on May 4, 2019. Retrieved July 30, 2019.
  22. ^ Sweeney, Steve (May four, 2019). "UP steam coiffure has Large Male child ready to roll". Trains. Archived from the original on May vi, 2019. Retrieved July 30, 2019.
  23. ^ "2019 Union Pacific Steam Schedule". Union Pacific. Archived from the original on April 30, 2019. Retrieved July 25, 2019.
  24. ^ "World'due south largest locomotive coming to West Chicago to gloat 150th anniversary of Transcontinental Railroad completion". WLS-TV. July 24, 2019. Archived from the original on July 25, 2019. Retrieved July 25, 2019.
  25. ^ "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.
  26. ^ Wrinn, Jim (May 16, 2019). "Big Boy stubs its toe with derailment". Trains. Archived from the original on May 22, 2019. Retrieved June 9, 2019.
  27. ^ Cobb, Debbie (May 17, 2019). "Large Boy Derailed On Way To Laramie, Back On Schedule". KCGY. Archived from the original on May 17, 2019. Retrieved June 9, 2019.
  28. ^ "Cheyenne'due south Large Boy 4004 to polish in new paint July ix". Trains. June 26, 2018. Archived from the original on Apr 14, 2019. Retrieved July 12, 2019.
  29. ^ Male monarch, Kat (September iv, 2009). "The Forney Museum is worth getting around to". The Denver Mail service. Archived from the original on July 27, 2019. Retrieved July 27, 2019.
  30. ^ "Steamtown National Historic Site's Union Pacific "Big Male child" No. 4012 Removed From Public Display For Corrective Restoration and Painting - Steamtown National Historic Site (U.S. National Park Service)".
  31. ^ a b c Chappell, Gordon. "Union Pacific Railroad No. 4012". Steam Over Scranton: Special History Study, American Steam Locomotives. National Park Service. Archived from the original on August 13, 2012. Retrieved March 13, 2012.
  32. ^ "Steamtown'southward Locomotives and Cars". Steamtown National Celebrated Site. National Park Service. Retrieved March 13, 2012.
  33. ^ "Union Pacific "Large Boy" 4014". RailGiants Train Museum. Archived from the original on April 27, 2019. Retrieved July 13, 2019.
  34. ^ Annotation: Photo past QBL1201713 - UP 4014 tender number plate-
  35. ^ Wrinn (2020), p. 143.
  36. ^ Note: Nelson, Paul (August 6, 2020) National Railroad Museum, Dark-green Bay, Wisconsin Provided tender information.
  37. ^ "Big Boy Steam Locomotive Arrives at its New Home in Frisco". Museum of the American Railroad. Baronial 26, 2013. Archived from the original on April 13, 2016. Retrieved July 28, 2019.
  38. ^ Annotation: Garbutt, John (August v, 2020); Murphy, Kellie (Baronial 6, 2020) Museum of American Railroad, Frisco, Texas Provided tender information.
  39. ^ Note: Yakubov, Vladimir Photo - UP 4-eight-8-4 "Big Boy" #4023, Kenefick Park, Omaha, NE.Silicon Valley Scale Modelers Tender Classification Plate Number.

References [edit]

  • Drury, George (2015). Guide to Due north American Steam Locomotives (2d ed.). Kalmbach Media. ISBN978-ane-62700-259-2.
  • Peck, C. B.; Combes, C. 50.; et al., eds. (1950). 1950-52 Locomotive Cyclopedia of American Practice (Fourteenth ed.). New York: Simmons-Boardman.
  • Solomon, Brian (2009). Alco Locomotives (1st ed.). Voyageur Printing. ISBN978-0-7603-3338-9.

Farther reading [edit]

  • Bush, John E.; Ehernberger, James L. (1996). Wedlock Pacific Steam Big Boy Portraits (1st ed.). Challenger Press. ASIN B0027ZOGLA.
  • Reisdorff, James J. (2007). The Big Legacy of the Wedlock Pacific Big Boy: Why Railfans Still Love the "World's Largest" Steam Locomotive (1st ed.). S Platte Press. ISBN978-0942035735.
  • Wrinn, Jim (2020). Union Pacific's Big Boys: The Complete Story from History to Restoration (1st ed.). Kalmbach Books. ISBN978-1627007924.

External links [edit]

  • UP Steam

castellanoforeplarks.blogspot.com

Source: https://en.wikipedia.org/wiki/Union_Pacific_Big_Boy

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