Chicago & Illinois Midland 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class A-1 (Locobase 7651)

Data from C&IM 4 -1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 77, pp. 372+. Works numbers were 60064-60065 in June 1927 and 60590 in August 1928.

The Baldwin specs addressed a service that ran on 90 lb/yard (45 kg/metre) rail, met 16 deg curves, and scaled 2% grades.

According to George Drury (1993), these were the last three Americans built for any railroad in North America. Yet, as Drury notes, this purchase wasn't a fluke. The railroad still ran a Springfield-Peoria passenger service daily and even upgraded its passenger car fleet by buying six steel passenger cars. The three locomotives provided enough power for the trains on the schedule and could even be double-headed in a pinch.

By the late 1940s, passenger traffic had withered and 501 was sold for scrap. The last passenger train ran in 1953 and the surviving pair of 4-4-0s went to the scrapyard as well.

Specifications by Steve Llanso of Sweat House Media
ClassA-1
Locobase ID7651
RailroadChicago & Illinois Midland
CountryUSA
Whyte4-4-0
Number in Class3
Road Numbers500-502
GaugeStd
Number Built3
BuilderBaldwin
Year1927
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)7
Engine Wheelbase (ft)21.33
Ratio of driving wheelbase to overall engine wheebase 0.33
Overall Wheelbase (engine & tender) (ft)47.92
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)77,400
Engine Weight (lbs)118,400
Tender Loaded Weight (lbs)109,960
Total Engine and Tender Weight (lbs)228,360
Tender Water Capacity (gals)4500
Tender Fuel Capacity (oil/coal) (gals/tons)10
Minimum weight of rail (calculated) (lb/yd)65
Geometry Relating to Tractive Effort
Driver Diameter (in)64
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)18,590
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.16
Heating Ability
Firebox Area (sq ft)113
Grate Area (sq ft)21.70
Evaporative Heating Surface (sq ft)1170
Superheating Surface (sq ft)242
Combined Heating Surface (sq ft)1412
Evaporative Heating Surface/Cylinder Volume165.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3906
Same as above plus superheater percentage4570
Same as above but substitute firebox area for grate area23,798
Power L110,629
Power MT605.50

Reference


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