St Louis & Hannibal 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 18 (Locobase 13933)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 207. Works number was 37911 in June 1912.

Although only a medium-sized Mogul for its time, the 18 was one of the few delivered with a superheater already installed. It was a duplicate in "as many essential parts as practicable" to the Alco engine that had been delivered as #17.

The short line to which the 18 was delivered covered 103 miles in 1917, all of which had been completed by the Saint Louis, Hannibal & Keokuk and its successor the Saint Louis & Hannibal Railway. The 85 miles of main line from Hannibal to Gilmore was finished by 1882, while the branch line from Rails Junction to Perry, Mo was added by 1893, seven years after the StL, H & K was reorganized as the StL & H.

Never a truly prosperous line, the "Short Line" was sold in November 1919 to John Ringling (of Ringling Brothers) who sank about $325,000 in the line over the next decade trying to improve its profitability. The Great Depression killed that hope and all but southernmost 5 miles was closed in 1932; the stub was run for another 30 years as the St Louis & Troy.

According to notes in the Wikipedia entry that hosts the ICC valuation summary of this line, the editor rports: "Locally, the Short Line is still fondly remembered for its personal service and the kindness shown by owners, management, and crews. Gone but not forgotten."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13933
RailroadSt Louis & Hannibal
Number in Class1
Road Numbers18
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)22.08 / 6.73
Ratio of driving wheelbase to overall engine wheelbase 0.63
Overall Wheelbase (engine & tender) (ft / m)47.90 / 14.60
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)110,000 / 49,895
Engine Weight (lbs / kg)128,000 / 58,060
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)208,000 / 94,347
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)61 / 30.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 1448
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)25,053 / 11363.86
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.39
Heating Ability
Tubes (number - dia) (in / mm)148 - 2" / 51
Flues (number - dia) (in / mm)21 - 5.375" / 137
Flue/Tube length (ft / m)12.50 / 3.81
Firebox Area (sq ft / m2)130 / 12.08
Grate Area (sq ft / m2)28.20 / 2.62
Evaporative Heating Surface (sq ft / m2)1458 / 135.45
Superheating Surface (sq ft / m2)305 / 28.34
Combined Heating Surface (sq ft / m2)1763 / 163.79
Evaporative Heating Surface/Cylinder Volume167.01
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4935
Same as above plus superheater percentage5774
Same as above but substitute firebox area for grate area26,618
Power L19242
Power MT555.68

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