Commonwealth Edison / Commonwealth Electric 0-6-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 15040)

Data from DeGolyer, Vol 29, p. 168. Works number was 29021 in September 1906.

Class 2 (Locobase 15041)

Data from DeGolyer, Vol 35, p. 294. Works number was 34747 in June 1910.

More powerful and 21 short tons heavier than the #1 of 1906 (Locobase 15040), this saddle-tank was not much longer. The boiler was fatter, but the tubes had the same length as the earlier engine.

Class 4 (Locobase 15042)

Data from DeGolyer, Vol 35, p. 294, Vol 73, pp. 27+. Works numbers were 40112 in July 1913, 55626 in September 1922, and 56723 in July 1923.

The next Baldwin to come to ComEd after the saddle tank of 1910 was this much bigger, but not much longer engine. Water storage now demanded a separate tender and the boiler, while quite a bit larger in diameter, still contained short boiler tubes.

It was an arrangement that worked, one supposes, because the 5 emerged from the same specifications nine years later followed by the 6 ten months after that.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15040 15041 15042
RailroadCommonwealth ElectricCommonwealth ElectricCommonwealth Edison
Number in Class113
Road Numbers124-6
Number Built113
BuilderBurnham, Williams & CoBaldwinBaldwin
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase10.83'11.50'
Engine Wheelbase10.83'11.50'
Ratio of driving wheelbase to overall engine wheebase11
Overall Wheelbase (engine & tender)10.83'43.44'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers110000 lbs152000 lbs154000 lbs
Engine Weight110000 lbs152000 lbs154000 lbs
Tender Light Weight100000 lbs
Total Engine and Tender Weight110000 lbs152000 lbs254000 lbs
Tender Water Capacity1500 gals2500 gals5000 gals
Tender Fuel Capacity (oil/coal)8 tons
Minimum weight of rail (calculated)61 lb/yard84 lb/yard86 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"50"50"
Boiler Pressure160 psi180 psi180 psi
Cylinders (dia x stroke)19" x 24"20" x 26"22" x 26"
Tractive Effort23566 lbs31824 lbs38507 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.67 4.78 4.00
Heating Ability
Firebox Area98 sq. ft119 sq. ft192 sq. ft
Grate Area21.26 sq. ft25.30 sq. ft35.10 sq. ft
Evaporative Heating Surface992 sq. ft1225 sq. ft2216 sq. ft
Superheating Surface
Combined Heating Surface992 sq. ft1225 sq. ft2216 sq. ft
Evaporative Heating Surface/Cylinder Volume125.96129.58193.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation340245546318
Same as above plus superheater percentage340245546318
Same as above but substitute firebox area for grate area156802142034560
Power L1250928884165
Power MT150.86125.66178.87

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