Bock Lumber Company 0-4-4 "Forney" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 11092)

Data from Logging Locomotives 1913 (Philadelphia, Pa: Baldwin Locomotive Works, 1913), p 5. See also DeGolyer, Vol 31, pp. 230. Works numbers were 32792 in May 1908.

This was another of Baldwin's small "off-the-shelf" designs that combined elements of high-volume manufacturing and the custom fitting that came with building steam locomotives of any size.

The Baldwin guide says that the little balloon-stacker (fuel was 1 cord of wood with a spark-arresting Radley & Hunter stack) was sold to the Goldsboro Lumber Company of Dover, NC, but the Specifications book does not list that transaction. Baldwin's location of Bock Lumber in Gainesville, Fla in 1913 is confirmed by a 1 January 1912 news note in the Lumber Trade Journal (p. 43) that reported the 12 December 1911 fire at the sawmill located three miles from the city.

Gene Connelly's Baldwin list says Bock sold the 1 to Hanbury Lumber of Archer, Fla. Maddox Foundry & Machine later operated the engine before selling it to B J Pollard in 1965.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,092
RailroadBock Lumber Company
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)10 / 3.05
Ratio of driving wheelbase to overall engine wheebase 0.50
Overall Wheelbase (engine & tender) (ft / m)10 / 3.05
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)21,200 / 9616
Engine Weight (lbs / kg)24,200 / 10,977
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)24,200
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)18 / 9
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 14" / 229x356
Tractive Effort (lbs / kg)4673 / 2119.64
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.54
Heating Ability
Firebox Area (sq ft / m2)33.50 / 3.11
Grate Area (sq ft / m2) 8.20 / 0.76
Evaporative Heating Surface (sq ft / m2)239 / 22.21
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)239 / 22.21
Evaporative Heating Surface/Cylinder Volume231.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1312
Same as above plus superheater percentage1312
Same as above but substitute firebox area for grate area5360
Power L13470
Power MT721.70

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Wes Barris