The boilers of these Moguls were built to American Locomotive specifications. The Baldwin specs stated that the Alco drawing 139-S-4990 could be "modified in dimensions to suit specifications", but was to be followed with regard to the fire door, position of the 610 Tate flexible stay bolts, mud ring section, pocket flues (one in front flue sheet, two in the back flue sheet), check [valve] position, and any "changes in red".
The flexible stay bolts totaled 610.
Locobase doesn't know what service the 10 and 11 performed, but suspects it was transfer freight operations in the Peoria area.
Less than 25 years later (on 3 May 1935) the class was declared "obsolete", which is sad-sounding, somehow.
Apparently the Rock Island didn't indulge itself in operating Moguls as this seems to be the only class of any size that used that wheel arrangement.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Peoria Terminal (CRI & P)||Chicago, Kansas & Nebraska (CRI&P)|
|Number in Class||2||42|
|Road Numbers||10-11||500-542 / 701-742|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||11.17 / 3.40||15.50 / 4.72|
|Engine Wheelbase (ft / m)||19.75 / 6.02||23.02 / 7.02|
|Ratio of driving wheelbase to overall engine wheebase||0.57||0.67|
|Overall Wheelbase (engine & tender) (ft / m)||44.56 / 13.58|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||142,200 / 64,501||87,000 / 39,463|
|Engine Weight (lbs / kg)||162,000 / 73,482||102,000 / 46,266|
|Tender Loaded Weight (lbs / kg)||125,000 / 56,699||65,000 / 29,484|
|Total Engine and Tender Weight (lbs / kg)||287,000 / 130,181||167,000 / 75,750|
|Tender Water Capacity (gals / ML)||6000 / 22.73||2700 / 10.23|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||10 / 9.10||5 / 4.50|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||79 / 39.50||48 / 24|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||51 / 1295||57.60 / 1463|
|Boiler Pressure (psi / kPa)||190 / 13.10||150 / 10.30|
|High Pressure Cylinders (dia x stroke) (in / mm)||21" x 26" / 533x660||19" x 24" / 483x610|
|Tractive Effort (lbs / kg)||36,309 / 16469.50||19,178 / 8699.00|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.92||4.54|
|Firebox Area (sq ft / m2)||168 / 14.50||121 / 11.25|
|Grate Area (sq ft / m2)||30 / 2.79||16.74 / 1.56|
|Evaporative Heating Surface (sq ft / m2)||1928 / 177.97||1368 / 127.14|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||1928 / 177.97||1368 / 127.14|
|Evaporative Heating Surface/Cylinder Volume||184.98||173.70|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||5700||2511|
|Same as above plus superheater percentage||5700||2511|
|Same as above but substitute firebox area for grate area||31,920||18,150|