Chicago & Northern Pacific 4-4-4 "Jubilee" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 20 (Locobase 2913)

Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). See also "A Brooks Suburban Locomotive", Railroad Gazette, Volume 23, (11 September 1891), p. 629.

Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004. Works numbers were 1825-1826 in February 1891.

Odd arrangement and odd-looking engine. It had a high cab with windows all around, wagon top boiler sharply coned to a slender boiler. RG's September 1891 report said the engine had "the modern smooth finish and a taper stack and has a wooden pilot in the front and rear ...[T]he engine presents a handsome appearance, and the details are well designed." (NB: RG's description of the wheel arrangement works out to a 2-4-2T.)

The C&NP conducted commuter operations out of Chicago. The development of an electric railway and related commuter service in Chicago is a complicated story laid out by David J. Fiore in [] (viewed 5 August 2004)

For Locobase's purpose, suffice to say that the C&NP, whose commuter service dated back to 1881, leased that service to the newly created Suburban Railroad in 1896 and the C&NP reorganized as the Chicago Terminal Transfer in July 1897. Our pair of suburban tanks kept their C&NP numbers.

The two later operated on the Chicago, Cincinnati & Louisville (The Straight Line) in 1902, having been renumbered 25-26. The CC&L was built as an independent line running diagonally through Indiana and Ohio to Cincinnati (it never got to Louisville). It failed not long after its inauguration and the line was absorbed by the Chesapeake & Ohio in 1911. At that point, the C & O took #25 as 1008, while 26 was sold to J. Joseph Brothers in 1911.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID2913
RailroadChicago & Northern Pacific
Number in Class2
Road Numbers20-21
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)28.50 / 8.69
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender) (ft / m)28.50 / 8.69
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)56,000 / 25,401
Engine Weight (lbs / kg)100,000 / 45,359
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)100,000
Tender Water Capacity (gals / ML)1600 / 6.06
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3 / 2.70
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 1448
Boiler Pressure (psi / kPa)165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 22" / 381x559
Tractive Effort (lbs / kg)12,180 / 5524.76
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Firebox Area (sq ft / m2)112
Grate Area (sq ft / m2)19.60 / 1.82
Evaporative Heating Surface (sq ft / m2)766 / 71.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)766 / 71.19
Evaporative Heating Surface/Cylinder Volume170.23
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3234
Same as above plus superheater percentage3234
Same as above but substitute firebox area for grate area18,480
Power L14619
Power MT363.68

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Wes Barris