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. 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. In 1930, the railroad ordered  eight 4-8-4 locomotives (Nos. 5600-5607) from the Baldwin Locomotive Works and classified them as O-5. The CB&Q were satisfied with the locomotives and lead the railroad to build an additional twenty-eight 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 roller bearings on every axle, 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. Between the  mid and late 1950s, all of the O-5s have been retired from revenue service. 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 its last CB&Q excursion and was due for an overhaul. However, by 1966 the railroad got a new president, Louis W. Menk, 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 subsequently scrapped in November 1972. Preservation. Four of the Burlington Route's "Northerns" have been preserved, all of which are of the O-5A/B batch.