Locobase 14262 shows the first three wood-burning logging Prairies that went to DeFuniak Springs, Fla in 1916 to work for the WB Harbeson Lumber Company. The next trio, which arrived in 1920, repeated the design, but trailed a heavier tender with the same 3-cord wood capacity and put a little more weight on the drivers. The 1924 engine (#11) also followed the pattern, but had a still large tender with 4 cords of wood (about 9,200 lb/4,173 kg of pine fuel).
Their assignment to Bagdad Land & Lumber Company underscored their primary service of supplying a 200,000 foot capacity mill in Bagdad, Fla.. Over the next decade, BL&LC increased the mill capacity to 300,000 feet.
The four remained with W B Harbeson through its 1936 reorganization as West Florida Lumber. 14-15 were later renumbered 128-129 by Harbeson.
Locobase 14265 shows the three 1920 logging Prairie wood-burners that succeeded the earlier engines. This oil-burner repeated the design except for trailing a heavier tender that carried oil. It too was owned by W B Harbeson and served the Bagdad (Fla) mill.
The 17 was later sold to the St Joe Lumber & Export Company, which it served until being scrapped, probably in 1950.
This lumber company was headquartered in Oak Point, Washington. At almost the same time they took delivery of this small Prairie, the company was bought by a group of Wisconsin timbermen who had formed the Wisconsin Logging & Timber Company.
The WL&T sold the 7 to Weed Lumber in December 1919.
Slightly larger and rolling on a longer wheelbase than the Benson Timber #7 (Locobase 12915), this Prairie soon transferred to Benson Timber rails that ran out of Clatskanie, Ore. Wisconsion Logging & Timber eventually owned all of the Benson Timber properties
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Bagdad Land & Lumber Company||Bagdad Land & Lumber Company||Benson Logging & Lumber Company||Benson Logging & Lumber Company|
|Number in Class||4||1||1||1|
|Road Numbers||14-16, 11/128-129, 16, 11||17||7||8|
|Builder||Baldwin||Baldwin||Burnham, Williams & Co||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||9.17 / 2.80||9.17 / 2.80||7.67 / 2.34||9.17 / 2.80|
|Engine Wheelbase (ft / m)||23.75 / 7.24||23.75 / 7.24||23.83 / 7.26||24.67 / 7.52|
|Ratio of driving wheelbase to overall engine wheebase||0.39||0.39||0.32||0.37|
|Overall Wheelbase (engine & tender) (ft / m)||45.56 / 13.89||45.56 / 13.89|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||71,000 / 32,205||71,000 / 32,205||79,790 / 36,192||81,000 / 36,741|
|Engine Weight (lbs / kg)||92,000 / 41,731||92,000 / 41,731||108,490 / 49,210||110,500 / 50,122|
|Tender Loaded Weight (lbs / kg)||70,000 / 31,752||70,000 / 31,752||58,000 / 26,308||58,000 / 26,308|
|Total Engine and Tender Weight (lbs / kg)||162,000 / 73,483||162,000 / 73,483||166,490 / 75,518||168,500 / 76,430|
|Tender Water Capacity (gals / ML)||3500 / 13.26||3500 / 13.26||2500 / 9.47||2500 / 9.47|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||1200|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||39 / 19.50||39 / 19.50||44 / 22||45 / 22.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||44 / 1118||44 / 1118||44 / 1118||44 / 1118|
|Boiler Pressure (psi / kPa)||180 / 12.40||180 / 12.40||180 / 12.40||180 / 12.40|
|High Pressure Cylinders (dia x stroke) (in / mm)||15" x 24" / 381x610||15" x 24" / 381x610||16" x 24" / 406x610||16" x 24" / 406x610|
|Tractive Effort (lbs / kg)||18,777 / 8517.11||18,777 / 8517.11||21,364 / 9690.56||21,364 / 9690.56|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.78||3.78||3.73||3.79|
|Firebox Area (sq ft / m2)||86 / 7.99||86 / 7.99||128 / 11.90||128 / 11.90|
|Grate Area (sq ft / m2)||14.10 / 1.31||14.10 / 1.31||16 / 1.49||16 / 1.49|
|Evaporative Heating Surface (sq ft / m2)||1074 / 99.78||1074 / 99.78||1567 / 145.63||1567 / 145.63|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||1074 / 99.78||1074 / 99.78||1567 / 145.63||1567 / 145.63|
|Evaporative Heating Surface/Cylinder Volume||218.79||218.79||280.57||280.57|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2538||2538||2880||2880|
|Same as above plus superheater percentage||2538||2538||2880||2880|
|Same as above but substitute firebox area for grate area||15,480||15,480||23,040||23,040|