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UP 4014 Big Boy Rolling at Pomona, CA
UP 4014 Big Boy Rolling at Pomona, CA
Published: 2013/11/14
Channel: rForsstrom
Review: MTH HO Big Boy 4-8-8-4 2017 Run Proto Sound 3.0 Steam
Review: MTH HO Big Boy 4-8-8-4 2017 Run Proto Sound 3.0 Steam
Published: 2017/06/02
Channel: jlwii2000
Big Boy Banter! | TS2016 | Union Pacific 4-8-8-4 Big Boy | Sherman Hill
Big Boy Banter! | TS2016 | Union Pacific 4-8-8-4 Big Boy | Sherman Hill
Published: 2016/05/28
Channel: Moleman978
Lionel Vision Line Union Pacific 4-8-8-4 Big Boy #4014
Lionel Vision Line Union Pacific 4-8-8-4 Big Boy #4014
Published: 2015/01/13
Channel: ericstrains
Lego Boy
Lego Boy's MOC U.P. Big Boy steam locomotive JH-4-8-8-4
Published: 2016/07/22
Channel: Broadway Infocenter
Union Pacific Big Boy 4005 (4-8-8-4)
Union Pacific Big Boy 4005 (4-8-8-4)
Published: 2011/09/17
Channel: Bill Rogers
Athearn N Scale 4-8-8-4 Big Boy With DCC And Sound
Athearn N Scale 4-8-8-4 Big Boy With DCC And Sound
Published: 2017/07/28
Channel: TrainWorldTV
N Scale DCC UP Big Boy 4014 4-8-8-4 Athearn Product Review
N Scale DCC UP Big Boy 4014 4-8-8-4 Athearn Product Review
Published: 2016/12/02
Channel: tsgmultimedia
MTH 4-8-8-4 Big Boy #4014
MTH 4-8-8-4 Big Boy #4014
Published: 2017/04/22
Channel: ericstrains
Lego Bricks
Lego Bricks' MOC U.P. Big Boy steam locomotive JH-4-8-8-4 - Part 1
Published: 2016/07/03
Channel: Broadway Infocenter
Union Pacific 4-8-8-4 "Big Boy" 4000 class tribute
Union Pacific 4-8-8-4 "Big Boy" 4000 class tribute
Published: 2016/12/24
Channel: Rail Fanning 844
Big Boy
Big Boy's 1st Steam Trial - LIVE STEAM
Published: 2012/11/06
Channel: tootall287
Union Pacific "Big Boy" 4-8-8-4
Union Pacific "Big Boy" 4-8-8-4
Published: 2016/10/29
Channel: Dan the Train Man
LEGO TRAIN BIG BOY 4-8-8-4 INSTRUCTIONS
LEGO TRAIN BIG BOY 4-8-8-4 INSTRUCTIONS
Published: 2013/08/24
Channel: scott mills
Review of Rivarossi
Review of Rivarossi's New 4-8-8-4 Big Boy
Published: 2016/03/08
Channel: Railway City Productions
Review: MTH HO Baldwin Yellowstone 2-8-8-4 Steam Locomotive w/ DCC & Proto Sound 3
Review: MTH HO Baldwin Yellowstone 2-8-8-4 Steam Locomotive w/ DCC & Proto Sound 3
Published: 2016/03/07
Channel: jlwii2000
Broadway Limited Union Pacific HO Scale 4-8-8-4 Big Boy Rolling Thunder DCC Sound
Broadway Limited Union Pacific HO Scale 4-8-8-4 Big Boy Rolling Thunder DCC Sound
Published: 2017/02/04
Channel: DCCTRAIN
Union Pacific Big Boy Collection
Union Pacific Big Boy Collection
Published: 2007/06/21
Channel: pentrexvideos
Union Pacific 4-8-8-4 "Big Boy" Steam Engine Footage
Union Pacific 4-8-8-4 "Big Boy" Steam Engine Footage
Published: 2011/01/16
Channel: blackbirdxxxxx
Bricks
Bricks' Lego "U.P. Big Boy JH-4-8-8-4" steam locomotive, On the limit?
Published: 2017/02/27
Channel: Broadway Infocenter
Union Pacific "Big Boy" 4-8-8-4 Steam Locomotive - N scale by Athearn
Union Pacific "Big Boy" 4-8-8-4 Steam Locomotive - N scale by Athearn
Published: 2013/01/27
Channel: Southern Pacific Lines - Cascades Div. N Scale
MTH Union Pacific Big Boy 4-8-8-4 #4016
MTH Union Pacific Big Boy 4-8-8-4 #4016
Published: 2013/09/21
Channel: Trainman0425
4-8-4 Northern Plowing Snow at ILS
4-8-4 Northern Plowing Snow at ILS
Published: 2013/12/21
Channel: The Steam Channel
Big boy 4014 inaugural run - MTH O scale portosound 3.0 4-8-8-4
Big boy 4014 inaugural run - MTH O scale portosound 3.0 4-8-8-4
Published: 2016/09/01
Channel: Trainboy Robby
2013 Athearn N Scale Big Boy 4-8-8-4 Review
2013 Athearn N Scale Big Boy 4-8-8-4 Review
Published: 2013/04/19
Channel: Andrew Kiely
Union Pacific Big Boy 4-8-8-4, Athearn N scale
Union Pacific Big Boy 4-8-8-4, Athearn N scale
Published: 2012/04/24
Channel: Southern Pacific Lines - Cascades Div. N Scale
Train Simulator 2015 - Majestic Falls, UP BigBoy 4-8-8-4
Train Simulator 2015 - Majestic Falls, UP BigBoy 4-8-8-4
Published: 2015/03/27
Channel: Matt Peddlesden
LIONEL 6-11123 LEGACY UNION PACIFIC SCALE 4-8-8-4 BIG BOY #4023
LIONEL 6-11123 LEGACY UNION PACIFIC SCALE 4-8-8-4 BIG BOY #4023
Published: 2017/02/24
Channel: OGAUGERxR
Precision Craft Big Boy 4-8-8-4 Union Pacific UP Runs Perfectly & Quiet ! DC PCM
Precision Craft Big Boy 4-8-8-4 Union Pacific UP Runs Perfectly & Quiet ! DC PCM
Published: 2017/12/15
Channel: Kevin C
ACCUCRAFT  UP 4-8-8-4 BIG BOY, LIVE STEAM
ACCUCRAFT UP 4-8-8-4 BIG BOY, LIVE STEAM
Published: 2012/08/01
Channel: AccucraftTrains
Lionel Santa Fe 4-8-4 Northern
Lionel Santa Fe 4-8-4 Northern
Published: 2013/06/08
Channel: ericstrains
O Gauge Union Pacific Big Boy 4-8-8-4 Joshua Lionel Cowen JLC vs differences Lionmaster
O Gauge Union Pacific Big Boy 4-8-8-4 Joshua Lionel Cowen JLC vs differences Lionmaster
Published: 2013/01/13
Channel: Lou Costabile
Precision Craft Models 4-8-8-4 Union Pacific Big Boy#4002 Steam Locomotive HO Scale
Precision Craft Models 4-8-8-4 Union Pacific Big Boy#4002 Steam Locomotive HO Scale
Published: 2012/11/29
Channel: warbonnet64
BIG BOY 4-8-8-4 TRIBUTE VIDEO
BIG BOY 4-8-8-4 TRIBUTE VIDEO
Published: 2011/07/26
Channel: ChaKaiPre
TS.2017 (Train Sim) Union Pacific 4-8-8-4 Big Boy Steam Locomotive Test-Run
TS.2017 (Train Sim) Union Pacific 4-8-8-4 Big Boy Steam Locomotive Test-Run
Published: 2017/03/26
Channel: Marshall Smith™
Accucraft (4-8-8-4) "BIG BOY" that we SOLD on eBay / Battery Powered / AirWire Controlled
Accucraft (4-8-8-4) "BIG BOY" that we SOLD on eBay / Battery Powered / AirWire Controlled
Published: 2017/06/19
Channel: dennissirrine
ebay unboxing ho brass trains haul big boy 4-8-8-4
ebay unboxing ho brass trains haul big boy 4-8-8-4
Published: 2016/07/31
Channel: Kevin C
Big
Big's Lego "U.P. Big Boy JH-4-8-8-4" steam locomotive, On the limit?
Published: 2017/02/27
Channel: Broadway Infocenter
Modeling a train: 4000-class 4-8-8-4  Blender timelapse part 1
Modeling a train: 4000-class 4-8-8-4 Blender timelapse part 1
Published: 2017/07/23
Channel: Nashman222
mth railking   big boy 4-8-8-4 Imperial
mth railking big boy 4-8-8-4 Imperial
Published: 2015/10/18
Channel: bens64
BLI Blue Line Custom 4-8-8-4 Big Boy
BLI Blue Line Custom 4-8-8-4 Big Boy
Published: 2010/01/16
Channel: Traintek, LLC
Union Pacific #4014 Big Boy 4-8-8-4 Steam Locomotive - Up Close Evening Run
Union Pacific #4014 Big Boy 4-8-8-4 Steam Locomotive - Up Close Evening Run
Published: 2015/03/14
Channel: mjc6184
N scale Athearn Big Boy 4-8-8-4 Lap around Smokey Mountain Southern Railroad
N scale Athearn Big Boy 4-8-8-4 Lap around Smokey Mountain Southern Railroad
Published: 2015/12/16
Channel: gforceAF331
MTH Premier UP Big Boy (4-8-8-4) O-Gauge Steam Locomotive
MTH Premier UP Big Boy (4-8-8-4) O-Gauge Steam Locomotive
Published: 2007/03/21
Channel: toytrains1
4-8-8-4 UP Big Boy with Circus Train - Monroe Train Show
4-8-8-4 UP Big Boy with Circus Train - Monroe Train Show
Published: 2013/02/10
Channel: piktrains
Lionel Union Pacific 4 8 8 4 Big Boy and PFE Reefers
Lionel Union Pacific 4 8 8 4 Big Boy and PFE Reefers
Published: 2016/10/20
Channel: 03patines
Athearn N Scale Big Boy 4-8-8-4
Athearn N Scale Big Boy 4-8-8-4
Published: 2013/04/24
Channel: TrainWorldTV
HO ATG 4 8 8 4 BIG BOY UP#4022 ♪DCC SOUND♪
HO ATG 4 8 8 4 BIG BOY UP#4022 ♪DCC SOUND♪
Published: 2017/02/08
Channel: kishamodels
Union Pacific 4-8-8-4 Big Boy steam locomotive #4014 move South Fontana 1/26/14
Union Pacific 4-8-8-4 Big Boy steam locomotive #4014 move South Fontana 1/26/14
Published: 2014/01/28
Channel: Railfan1000
Big Boy 4-8-8-4
Big Boy 4-8-8-4
Published: 2010/07/05
Channel: sealord64
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search
A Big Boy locomotive. This example is Union Pacific 4023.

A 4-8-8-4 in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck. These are commonly known as "Union Pacific Big Boys".

Other equivalent classifications are:

The equivalent UIC classification is refined to '(2′D)D2′' for Mallet locomotives.

4-8-8-4 Big Boys were only produced for the Union Pacific Railroad. Twenty-five such engines were built between 1941 and 1944, numbered 4000 to 4024. Eight of these locomotives survive, seven of which are on static public display at various sites in the United States. Union Pacific announced plans in August 2013[1] to restore No. 4014 to operation for use in mainline excursion service. No. 4014 is currently undergoing restoration, and is expected to be operational by 2019.[2]

The UP Big Boys were an expansion of the 4-6-6-4 "Challenger" type articulated locomotive. Although their wheels were an inch (25 mm) smaller than those of the Challengers, they were still able to sustain high speeds. Adding four driving wheels increased the pulling power of the locomotive and reduced the need for helper locomotives over steep grades.

Other American railroads considered buying 4-8-8-4s, including the Western Pacific Railroad, which already rostered large 2-8-8-2s and 4-6-6-4s, but diesel locomotives were gaining popularity and soon were able to displace these Big Boy locomotives.

External links[edit]

References[edit]

  1. ^ Union Pacific Community Ties. "UP: Big Wheels Not Yet Turnin'". Retrieved 9 December 2017. 
  2. ^ Trains Magazine. "Union Pacific Big Boy: Rebirth of a Legend". Retrieved 22 October 2013. 


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