Chicago, Burlington and Quincy class O-5

The Chicago Burlington and Quincy O-5 was a class of 36 4-8-4 "Northern" type steam locomotives built by the Baldwin Locomotive Works in 1930 and the CB&Q between 1936 and 1940 and operated by the CB&Q until the late 1950s.

Chicago Burlington and Quincy O-5 class
Chicago, Burlington and Quincy Railroad 5633 in Douglas, WY, USA. Built 1940 until 1956 in service, moved to Douglas in 1962
Type and origin
Power typeSteam
BuilderBaldwin Locomotive Works, CB&Q
Serial number61443-61444, 61496-61499, 61522-61523,
Build dateAugust-October 1930, 1936-1940
Total produced36
Specifications
Configuration:
​
 • Whyte4-8-4
 • UIC2′D2′ h2
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Leading dia.37 in (940 mm)
Driver dia.74 in (1,880 mm)
Trailing dia.43 in (1,092 mm)
WheelbaseLoco & tender: 90.69 ft (27.64 m)
Length103 ft 3 1⁄8 in (31.47 m)
Width10 ft 7 in (3.23 m)
Height16 ft 2 in (4.93 m)
Axle load69,340 lb (31,450 kilograms; 31.45 metric tons) (O-5)
69,757.5 lb (31,641.5 kilograms; 31.6415 metric tons) (O-5A/B)
Adhesive weight272,000 lb (123,000 kilograms; 123 metric tons) (O-5)
279,030 lb (126,570 kilograms; 126.57 metric tons) (O-5A/B)
Loco weight454,600 lb (206,200 kilograms; 206.2 metric tons) (O-5)
474,620 lb (215,280 kilograms; 215.28 metric tons) (O-5A/B)
Tender weight337,000 lb (153,000 kilograms; 153 metric tons) (O-5)
359,000 lb (163,000 kilograms; 163 metric tons) (O-5A/B)
Total weight791,600 lb (359,100 kilograms; 359.1 metric tons) (O-5)
833,620 lb (378,120 kilograms; 378.12 metric tons) (O-5A/B)
Fuel typeCoal
Fuel oil (O-5B)
Fuel capacity24 t (24 long tons; 26 short tons) (O-5)
27 t (27 long tons; 30 short tons) (O-5A)
7,300 US gal (28,000 l; 6,100 imp gal) (O-5B)
Water cap18,000 US gal (68,000 l; 15,000 imp gal)
Firebox:
 • Firegrate area		106.50 sq ft (9.894 m2)
Boiler pressure250 lbf/in2 (1.72 MPa)
Heating surface:
 • Firebox		439 sq ft (40.8 m2) (O-5)
433 sq ft (40.2 m2) (O-5A/B)
Superheater:
​
 • Heating area2,403 sq ft (223.2 m2)
CylindersTwo
Cylinder size28 in × 30 in (711 mm × 762 mm)
Valve gearBaker
Valve typePiston valves
Performance figures
Maximum speedOver 75 mph (121 km/h)
Power output4,100 hp (3,100 kW)[1]
Tractive effort67,541 lbf (300.44 kN)
80,741 lbf (359.15 kN) with booster
Factor of adh.4.03 (O-5)
4.13 (O-5A/B)
Career
OperatorsChicago, Burlington and Quincy
ClassO-5
O-5A
O-5B
Numbers5600–5635
RetiredMid to late 1950s
PreservedFour preserved (Nos. 5614, 5629, 5631 and 5633)
DispositionNos. 5614, 5629, 5631 and 5633 on display, remainder scrapped

The locomotives saw service pulling both freight and passenger trains and four have been preserved, all of which are on display.

History

With an increase of traffic on the CB&Q, the railroad needed more powerful locomotives to pull the heavier loads and increased number of cars hauled.[2] In 1930, the railroad ordered 8 4-8-4 locomotives and classified them as O-5. The CB&Q was satisfied with the locomotives and lead the railroad to build an additional 28 4-8-4 locomotives classed as O-5A in its own West Burlington, Iowa. Of the first eight O-5s, the first had fireboxes burning lignite coal while the last two took bituminous coal. No. 5607 had a booster that added 13,200 lbs (5,987 kg) tractive effort. One of the locomotives was reported pulling an 82 car mail train on October 17, 1944. Nos. 5600, 5602, 5604, 5605 and 5606 were fitted with Security circulators and reclassified O-5A. Between 1936 and 1940, the CB&Q built their own versions of the O-5 following the success of the class and were classified as O-5A. Nos. 5609, 5618, 5619, 5620 were fitted with Security circulators and 5610 received thermic syphons. The last 15 O-5s (nos. 5621-5635) were fitted with lightweight rods, all-weather vestibule cabs and a solid pilot. Nos. 5614, 5620, 5626, 5627, 5629, and 5632 were converted to burn oil later in their service lives and were reclassified as O-5B.

5632 with 2-8-2 Mikado 4960 at the Clyde Roundhouse. Seven years before the O-5b would meet her fate.

Between the mid and late 1950s, all of the O-5s have been retired from revenue service.[3] After being retired from revenue service, No. 5632 was brought out of retirement and was used to haul excursions for the CB&Q steam program until November 1, 1964 when it hauled the last CB&Q excursion and was due for an overhaul. However, by 1966 the railroad got a new president who ended the program and the repairs on 5632 were halted. The locomotive was sold to caretaker, Richard Jensen, who moved it to the Chicago and Western Indiana Roundhouse for storage. In 1969, the locomotive was moved to a scrapyard, where the locomotive derailed on a switch and it was eventually scrapped.[4]

Preservation

Four of the Burlington Route's "Northerns" have been preserved, all of which are of the O-5A/B batch.

Locomotive 5631 on static display at Sheridan, Wyoming

Roster
NumberBaldwin serial numberDate builtDispositionNotes
560061443August 1930Scrapped 1960.
560161444August 1930Sold for scrap.
560261496September 1930Sold for scrap.
560361497September 1930Sold for scrap.
560461498September 1930Sold for scrap.
560561499September 1930Sold for scrap.
560661522October 1930Sold for scrap.
560761523October 1930Sold for scrap.Received booster that added 13,200 lbs of tractive effort.
5608N/ASeptember 1936Sold for scrap.
5609N/ASeptember 1936Sold for scrap.
5610N/AOctober 1936Sold for scrap.
5611N/AJune 1937Sold for scrap.
5612N/AJune 1937Sold for scrap.
5613N/AJuly 1937Sold for scrap.
5614N/AJuly 1937Retired September 1957, on display in a city park in St. Joseph, Missouri.Converted to oil burning O-5B.
5615N/AAugust 1937Sold for scrap.
5616N/AAugust 1937Sold for scrap.
5617N/ASeptember 1937Sold for scrap
5618N/AOctober 1937Sold for scrap.
5619N/AOctober 1937Sold for scrap.
5620N/AOctober 1937Sold for scrap.Converted to oil burning O-5B.
5621N/AJuly 1938Sold for scrap.
5622N/AAugust 1938Sold for scrap.
5623N/AAugust 1938Sold for scrap.
5624N/ASeptember 1938Sold for scrap.
5625N/AMarch 1940Sold for scrap.
5626N/AApril 1940Sold for scrap.Converted to oil burning O-5B.
5627N/AApril 1940Sold for scrap.Converted to oil burning O-5B.
5628N/AMay 1940Sold for scrap.
5629N/AJune 1940Retired 1956 in Lincoln, Nebraska, on display at the Colorado Railroad Museum in Golden, Colorado.Converted to oil burning O-5B.
5630N/AJune 1940Sold for scrap.
5631N/AJuly 1940On display at a depot in Sheridan, Wyoming.
5632N/AAugust 1940Scrapped after excursion service.Converted to oil burning O-5B.
5633N/AAugust 1940Retired 1956, on display at the Douglas Railroad Interpretive Center in Douglas, Wyoming.
5634N/ASeptember 1940Sold for scrap.
5635N/AOctober 1940Sold for scrap.

References
  1. https://ctr.trains.com/~/media/files/pdf/4-8-4-locomotives/4-early-baldwin-4-8-4-dbhp.pdf
  2. https://coloradorailroadmuseum.org/wp-content/uploads/2020/01/No-5629-Brochure.pdf
  3. "Chicago, Burlington & Quincy 4-8-4 "Northern" Locomotives in the USA". www.steamlocomotive.com.
  4. "Richard Jensen and the Story of CB&Q 4960, 4963, 5632 and GTW 5629". www.steamlocomotive.com.
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