Chicago & Northern Pacific 4-4-4 "Jubilee" Locomotives of 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).

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.

Odd arrangement and odd-looking engine. It had a high cab with windows all around, wagon top boiler sharply coned to a slender boiler.

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 http://www.shore-line.org/FirstAndFastest/content/1902_AEC_Xing_Dispute.html (viewed 5 Aug 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.

Specifications by Steve Llanso of Sweat House Media
Class20
Locobase ID2913
RailroadChicago & Northern Pacific
CountryUSA
Whyte4-4-4T
Number in Class2
Road Numbers20-21
GaugeStd
Number Built2
BuilderBrooks
Year1890
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase7'
Engine Wheelbase28.50'
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender)28.50'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers56000 lbs
Engine Weight100000 lbs
Tender Light Weight
Total Engine and Tender Weight100000 lbs
Tender Water Capacity1600 gals
Tender Fuel Capacity (oil/coal)3 tons
Minimum weight of rail (calculated)47 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"
Boiler Pressure165 psi
Cylinders (dia x stroke)15" x 22"
Tractive Effort12180 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Firebox Area112 sq. ft
Grate Area19.60 sq. ft
Evaporative Heating Surface766 sq. ft
Superheating Surface
Combined Heating Surface766 sq. ft
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 area18480
Power L14619
Power MT363.68


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