These Eight-wheelers were four of five engines produced at the same time; the fifth went to the Milwaukee Road.
Angling southwest from the shore of Lake Michigan at Racine, Wisc, the WURR connected the Great Lakes system with the Mississippi River at Savanna, Illinois and thence down the left bank to Rock Island. Itself a merger of the Racine & Mississippi and Northern Illinois, the Western Union's route include the western Illinois towns Freeport, Beloit (Wisc) Lanark, and Mount Carroll that were given to these locomotives.
[Mount Carroll's Seminary, a progressive girl's boarding school then run by Frances Anne Wood Shimer and Cinderella M Gregory, would become Shimer College, an offshoot of the University of Chicago, in 1948. Locobase's editor graduated from Shimer in 1971, four years before the college left Mount Carroll. He also worked at the Milwaukee Road's roundhouse in Summer 1971.]
The Milwaukee renumbered the four several times. 1211 (ex-Freeport) was off the roster by 1910. The other three--now numbered 95-97--joined the 94 (see Locobase 16184) in class H3 until March and May 1918.
found itself leased to the Chicago, Milwaukee & St Paul in 1879.
NB: Locobase borrows the heating surface data associated with the Atlanta & Richmond 4-4-0s produced two years later to virtually identical dimensions; see Locobase 6514.
Locobase 16183 describes the four Eight-wheelers that went to the Western Union Railroad in 1874. This engine was included in that order, but unlike those locomotives, was merely numbered, not named. It would be grouped with three of the four engines in class H3.
[NB: Locobase borrows the heating surface data associated with the Atlanta & Richmond 4-4-0s produced two years later to virtually identical dimensions; see Locobase 6514.]
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Western Union (CM&StP)||Chicago, Milwaukee & St Paul (CM&StP)|
|Number in Class||4||1|
|Road Numbers||15-16, 18, 34/262-263, 265, 281/1211, 1334-1336/95||203/1333/94|
|Builder||Burnham, Parry, Williams & Co||Burnham, Parry, Williams & Co|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||8 / 2.44||8 / 2.44|
|Engine Wheelbase (ft / m)||21.75 / 6.63||21.75 / 6.63|
|Ratio of driving wheelbase to overall engine wheebase||0.37||0.37|
|Overall Wheelbase (engine & tender) (ft / m)||42.33 / 12.90||42.33 / 12.90|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||43,775 / 19,856||43,775 / 19,856|
|Engine Weight (lbs / kg)||69,000 / 315,701||69,000 / 315,701|
|Tender Loaded Weight (lbs / kg)||/ 25,764||/ 25,764|
|Total Engine and Tender Weight (lbs / kg)||/ 341,465||/ 341,465|
|Tender Water Capacity (gals / ML)||2300 / 11.36||2300 / 11.36|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||36 / 18||36 / 18|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||62 / 1575||62 / 1575|
|Boiler Pressure (psi / kPa)||130 / 9||130 / 9|
|High Pressure Cylinders (dia x stroke) (in / mm)||16" x 24" / 406x610||16" x 24" / 406x610|
|Tractive Effort (lbs / kg)||10,950 / 4966.84||10,950 / 4966.84|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.00||4.00|
|Firebox Area (sq ft / m2)||92 / 8.55||92 / 8.55|
|Grate Area (sq ft / m2)||15.50 / 1.44||15.50 / 1.44|
|Evaporative Heating Surface (sq ft / m2)||933 / 86.68||933 / 86.68|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||933 / 86.68||933 / 86.68|
|Evaporative Heating Surface/Cylinder Volume||167.05||167.05|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2015||2015|
|Same as above plus superheater percentage||2015||2015|
|Same as above but substitute firebox area for grate area||11,960||11,960|