Little Rock, Maumelle & Western 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 14150)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 48, p. 268. See the Tap Line Case summaries at 8 Western.html. for a more detailed description of this logging road. Works number was 40320 in August 1913.

The LRM & W was incorporated in 1907 to build a road from Little Rock to Cold Spring, Ark, a distance of about 25 miles. It served the interests of A J Neimeyer Lumber Company. In 1916, the railroad had 2 locomotives and 90 cars in operation. The line was rock ballasted and laid with 60 lb/yard (30 kg/metre) rail.

The Interstate Commerce Commission's Tap Line Case summary outlines the railroad succinctly: "It is important to observe that the tap line parallels the line of the Rock Island, which is at no point more than 5 miles away. The intervening country is hilly and broken. Three towns are mentioned on the record as being reached by the tap line. Becker is a sawmill settlement, its only other industries being a brick plant and the penitentiary; at Carnes there is a small hardwood mill, which cuts hard-wood lumber for the Neimeyer Lumber Company, at a charge of $3 per 1,000 feet; and Maumelle, otherwise known as Douglas, is apparently only a logging camp. There are two or three small stave shippers on the line."

The 101 didn't serve all that long as the LRM & W's Ten-wheeler--the railroad folded in 1921 when the timber stands had been harvested, a year after the engine was sold to Choctaw Lumber.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,150
RailroadLittle Rock, Maumelle & Western
Number in Class1
Road Numbers101
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)23.12 / 7.05
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender) (ft / m)51.54 / 15.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)102,000 / 46,266
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 / ML/MT)8 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)57 / 28.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)25,145 / 11405.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area (sq ft / m2)152 / 14.12
Grate Area (sq ft / m2)24.30 / 2.26
Evaporative Heating Surface (sq ft / m2)1920 / 178.37
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1920 / 178.37
Evaporative Heating Surface/Cylinder Volume271.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4253
Same as above plus superheater percentage4253
Same as above but substitute firebox area for grate area26,600
Power L15087
Power MT329.85

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Wes Barris