#5633 is a Northern (4-8-4) type locomotive on display at the Douglas Railroad Interpretive Center on Brownfield Road in Douglas, WY.
The Chicago, Burlington & Quincy bought its first eight Northerns from Baldwin in 1931 (#5600-#5607). Designated Class O-5, they were used on both freight and passenger services and proved very successful. The CB&Q then made some modifications to the design and built thirteen of its own at its West Burlington, IA, Workshops in 1937 (#5608-#5620). Designated Class O-5A the new locomotives used Baldwin boilers but were fitted with Worthington SA feedwater heaters.
A further fifteen were built in 1939 (#5621-#5635), bringing the roster to thirty-six. The last batch was equipped with Boxpok drivers, and many of the
O-5s were rebuilt to O-5A standards with roller bearings, lightweight rods, vestibule cabs and solid cast pilots. You can see CBQ O-5A #5629 on the Colorado Railroad Museum page of this website. #5631 is on display in Sheridan, WY. You can see it on the CBQ #5631 page of this website.
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The Baldwin built O-5 engines weighed 461,000 lbs, the O-5As 473,700 lbs but, except for the Worthington SA feedwater heaters, they were identical.
They have 28" x 30" cylinders and are equipped with Baker valve gear and 74" Boxpok disk drivers.
The tender weighs 350,500 lbs light with a capacity of 27 tons of coal and 18,000 gallons of water.
Below, the underside of the locomotive
deck apron (top), the stoker feed
connection (upper middle) and radial buffer (centre).
Top, another view of the automatic stoker feed pipe under the deck and, lower photo, grate shaker levers on the fireman’s side and stoker feed. Note the angular inspection chamber to allow access to the augur screw.
#5633’s grate is 106.5 sq ft and the 433 sq ft
firebox heating surface includes 45 sq ft of arch tubes and an 83 sq ft combustion chamber. With an additional 2,403 sq ft of superheating the total heating surface was 7,628 sq ft. Operating at a boiler pressure of 250 psi, it delivered 67,500 lbs tractive effort.