Angelina & Neches River 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 108 (Locobase 14709)

Data from DeGolyer, Volume 62, pp. 383. Works number was 52820 in January 1920.

Purchaser was the A&NR's parent company, the San Augustine Lumber Company. The superheated steam in this logging Prairie required the adoption of 8" (203 mm) piston valves to feed the cylinders.

In 1945, the A&NR sold the 108 to the Reader Railroad in Arkansas. Thirty-one years later, the 108 moved on to North Conway, New Hampshire to star on the Conway Scenic Railroad. It was later sold to the Blacklands Railroad, Church St., Sulphur Springs, TX, where it is reportedly under restoration.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14709
RailroadAngelina & Neches River
Number in Class1
Road Numbers108
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.17 / 3.10
Engine Wheelbase (ft / m)26.83 / 8.18
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft / m)48.46 / 14.77
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)103,000 / 46,720
Engine Weight (lbs / kg)125,000 / 56,699
Tender Loaded Weight (lbs / kg)99,000 / 44,906
Total Engine and Tender Weight (lbs / kg)224,000 / 101,605
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2000 / 7.60
Minimum weight of rail (calculated) (lb/yd / kg/m)57 / 28.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)47 / 1194
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)25,313 / 11481.80
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.07
Heating Ability
Firebox Area (sq ft / m2)121 / 11.24
Grate Area (sq ft / m2)18.20 / 1.69
Evaporative Heating Surface (sq ft / m2)1245 / 115.66
Superheating Surface (sq ft / m2)238 / 22.11
Combined Heating Surface (sq ft / m2)1483 / 137.77
Evaporative Heating Surface/Cylinder Volume176.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3276
Same as above plus superheater percentage3800
Same as above but substitute firebox area for grate area25,265
Power L17963
Power MT511.32

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Wes Barris