This engine supported the lumbering operations of the J F Prettyman company based in Summerville.The Summerville & St John had operated in the 19th Century, but was reported abandoned in 1896. The line was sold to J F Prettyman in 1909.
That it was primarily a logging road is suggested by the 40 lb/yard (20 kg/metre) rail. Its main line had relatively gentle maximum curves of 10-12 degrees. This bi-fuel logging Prairie (wood and coal) was well suited to such duty.
The South Carolina history described the operation: "This lumber plant is of strictly modem construction, and turns out a high grade of material. The timber is supplied by about twenty miles of standard gauge railroad, all of which is owned and operated by the firm, as a, means of bringing in their logs and timber, of which they have a sufficient supply to operate the manufacturing plant indefinitely."
The 6 later operated for Charleston, SC's A C Tuxbury Lumber Company.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||J F Prettyman & Company|
|Number in Class||1|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.39|
|Overall Wheelbase (engine & tender)||45.06'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||61500 lbs|
|Engine Weight||88400 lbs|
|Tender Light Weight||60000 lbs|
|Total Engine and Tender Weight||148400 lbs|
|Tender Water Capacity||3000 gals|
|Tender Fuel Capacity (oil/coal)|
|Minimum weight of rail (calculated)||34 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||170 psi|
|Cylinders (dia x stroke)||14" x 22"|
|Tractive Effort||14835 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.15|
|Firebox Area||77 sq. ft|
|Grate Area||13.30 sq. ft|
|Evaporative Heating Surface||1071 sq. ft|
|Combined Heating Surface||1071 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||273.23|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2261|
|Same as above plus superheater percentage||2261|
|Same as above but substitute firebox area for grate area||13090|