Alexander Gilmer Lumber Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 13119)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 30, p. 158. See also Thad Sitton & James H. Conrad, Nameless towns: Texas sawmill communities, 1880-1942 (Austin, TX: University of Texas Press, 1998). p. 63. Works number was 30152 in February 1907.

Headquartered in Remlig, Texas (to decipher the origins of the town name, read it backward), the AGLC adopted the Baldwin Prairie logging locomotive design for its operations. They proclaimed themselves as Manufacturers of Nothing But Long Leaf Yellow Pine. After some years on the AGLC, the 2 was sold to Martin Wagon Company.

Sitton and Conrad report that like many other lumber companies of the time, Alexander Gilmer used a pay-slip system which operated daily but were redeemed only once a month for merchandise at the company store. Used any earlier, the slips would lose some of their face value and private merchants would discount the slips by 20-30%

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13119
RailroadAlexander Gilmer Lumber Company
Number in Class1
Road Numbers3
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.17 / 2.80
Engine Wheelbase (ft / m)23.75 / 7.24
Ratio of driving wheelbase to overall engine wheelbase 0.39
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)61,000 / 27,669
Engine Weight (lbs / kg)83,300 / 37,784
Tender Loaded Weight (lbs / kg)50,000 / 22,680
Total Engine and Tender Weight (lbs / kg)133,300 / 60,464
Tender Water Capacity (gals / ML)2500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)14,967 / 6788.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Tubes (number - dia) (in / mm)147 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.87 / 3.62
Firebox Area (sq ft / m2)82.20 / 7.64
Grate Area (sq ft / m2)14.13 / 1.31
Evaporative Heating Surface (sq ft / m2)991 / 92.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)991 / 92.10
Evaporative Heating Surface/Cylinder Volume242.30
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2543
Same as above plus superheater percentage2543
Same as above but substitute firebox area for grate area14,796
Power L14730
Power MT512.85

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