Sawyer & Austin Lumber Company 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 9 (Locobase 14060)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 45, p. 65. See also Frederick E Olmsted, "Working Plan for Forest Lands Near Pine Bluff, Ark," United States Forest Service Bulletin No. 32 (March 1902), pp. 40-. Works number was 41165 in February 1914.

Sawyer & Austin began operations in and near La Crosse, Wisconsin. The company later set up a subsidiary operation near Pine Bluff, Arkansas at about the same time that it was taken over by Cargill. S & A requested in 1901 a US Forest Service review of their holdings and suggestions on how to manage the 105,000 acres of timber. This survey and report represented the first forestry management plan undertaken by the Forest Service.

In 1909, the S & A ordered this relatively large logging Ten-wheeler. The specs show a relatively gently laid-out railroad of 1% grades and 15-degree curves (383 ft/117 metre radii). Water tanks were spaced 18 miles apart on this road of 56-60 lb/28-30 kg/metre rail.

Cargill sold its interests in S & A to Long-Bell Lumber in June 1911 (except for 44,000 acres of cut-over land). Long-Bell organized the Arkansas Short Leaf Lumber Company to exploit the new timber holdings and operate the logging road.

(See also Mrs T J Mott, "Our National Parks", Forestry and Irrigation (August 1907), pp. 415-424, a winsome characterization of the National Park System as a means to control the indiscriminate logging of the nation's forests in a presentation from the inaugural years of the conservation movement.)

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,060
RailroadSawyer & Austin Lumber Company
Number in Class1
Road Numbers9
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.25 / 4.04
Engine Wheelbase (ft / m)24.75 / 7.54
Ratio of driving wheelbase to overall engine wheebase 0.54
Overall Wheelbase (engine & tender) (ft / m)52.37 / 15.96
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)102,500 / 46,493
Engine Weight (lbs / kg)135,000 / 61,235
Tender Loaded Weight (lbs / kg)100,000 / 45,359
Total Engine and Tender Weight (lbs / kg)235,000 / 106,594
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)57 / 28.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)25,644 / 11631.94
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.00
Heating Ability
Firebox Area (sq ft / m2)141.50 / 13.15
Grate Area (sq ft / m2)29.20 / 2.71
Evaporative Heating Surface (sq ft / m2)2137 / 198.53
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2137 / 198.53
Evaporative Heating Surface/Cylinder Volume250.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5256
Same as above plus superheater percentage5256
Same as above but substitute firebox area for grate area25,470
Power L15601
Power MT361.41

All material Copyright ©
Wes Barris