Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 25, p. 13. See also Wayne Leeman, "Missouri and Illinois Rail Line Had Stormy Career From Start", St Louis Post-Dispatch (1955), archived on the MoPac Heritage website at [], last accessed 20 October 2019.
Works numbers were 24691, 24701 in September 1904.
Baldwin delivered five Moguls to the Southern Missouri Railroad in 1902 (Locobase 12617). Two years and merger later, the Illinois Southern, which now owned those five 2-6-0s, bought two more of the same design. Although the railroad ordered the pair on 28 July 1904 as road numbers 312-313, a 15 November 1904 change from the railroad changed them to 311-312.
Of particular mention was the insistence that the builder "give particular attention to getting even distribution of weight." Among the "special equipment" specified were Linstrom eccentrics, which were fastened to the axle with a U-bolt rather than set screws and Linstrom non-freezing suction pipe to convey feed water from tender to boiler..
Financial struggles besetting ill-starred John R Walsh, self-styled Chicago tycoon, and the sinking of the Ste Genevieve transfer boat with "about half the railroad" led to the railroad entering receivership for two years in 1918-1920, after which it was bought by the Missouri-Illinois. The Mike and Ike's main line's western end lay in Bismarck (south of St Louis) and ran northeast, crossed the Mississippi by car ferry between Thomure, Mo and Kellogg, Ill and continued on through Centralia to Salem, where it met the direct Baltimore & Ohio line to St Louis.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 312/311 |
| Locobase ID | 16452 |
| Railroad | Illinois Southern |
| Country | USA |
| Whyte | 2-6-0 |
| Number in Class | 2 |
| Road Numbers | 312-313/311-312 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1904 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 19.92 / 6.07 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.60 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 114,000 / 51,710 |
| Engine Weight (lbs / kg) | 129,000 / 58,513 |
| Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
| Total Engine and Tender Weight (lbs / kg) | 229,000 / 103,872 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 63 / 31.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52 / 1321 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 24" / 508x610 |
| Tractive Effort (lbs / kg) | 28,246 / 12812.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 259 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.25 / 3.43 |
| Firebox Area (sq ft / m2) | 140.70 / 13.07 |
| Grate Area (sq ft / m2) | 22.28 / 2.07 |
| Evaporative Heating Surface (sq ft / m2) | 1654 / 153.66 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1654 / 153.66 |
| Evaporative Heating Surface/Cylinder Volume | 189.46 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4010 |
| Same as above plus superheater percentage | 4010 |
| Same as above but substitute firebox area for grate area | 25,326 |
| Power L1 | 4213 |
| Power MT | 244.42 |