Even as late as 1909, railroads were being chartered to fill in gaps in a dense railroad network. According to the Mount Pleasant history website (http://www.mpcity.net/history.htm, last accessed 30 January 2012), "...the difficulty of getting around during the wetter times of the year prompted the formation of the Paris and Mount Pleasant Railroad." The plan was to build from Paris, Texas (a few miles south of Hugo, Oklahoma) southeast to the county seat of Titus County, Mount Pleasant, a distance of 55 miles. Viewed in the context of the usual outcomes of many such shortline ambitions, it's remarkable that the plan was executed to the last milepost. The 24-mile section between Paris and Bogota was completed in less than a year and the additional 27 miles to Mount Pleasant was opened 19 months later in May 1912.
After its completion and despite an extended stay in receivership from 1920-1931, the Pa & Ma served the local communities for 40 years.
The 102 served for almost 3/4 of the time before being retired in 1939-1940.
For a wonder, that's just what happened. The 24-mile section between Paris and Bogota was completed in less than a year and the additional 27 miles to Mount Pleasant was opened 19 months later in May 1912.
A year after the P&MP bought its first Baldwin Ten-wheeler, it returned to Eddystone for a bigger engine. The 103 was larger than the 102 in every dimension save wheelbase. Sister 104 followed 15 months later.
Both engines operated on the railroad for almost 30 years before being retired in 1939-1940.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Paris & Mount Pleasant||Paris & Mount Pleasant|
|Number in Class||1||2|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.57||0.53|
|Overall Wheelbase (engine & tender)||45.57'||49.21'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||73000 lbs||95000 lbs|
|Engine Weight||98000 lbs||119600 lbs|
|Tender Light Weight||70000 lbs||100000 lbs|
|Total Engine and Tender Weight||168000 lbs||219600 lbs|
|Tender Water Capacity||3500 gals||5000 gals|
|Tender Fuel Capacity (oil/coal)||5 tons||7 tons|
|Minimum weight of rail (calculated)||41 lb/yard||53 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||180 psi||180 psi|
|Cylinders (dia x stroke)||16" x 24"||18" x 24"|
|Tractive Effort||16786 lbs||21245 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.35||4.47|
|Firebox Area||90 sq. ft||140 sq. ft|
|Grate Area||15.50 sq. ft||21.50 sq. ft|
|Evaporative Heating Surface||1222 sq. ft||1622 sq. ft|
|Combined Heating Surface||1222 sq. ft||1622 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||218.80||229.47|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2790||3870|
|Same as above plus superheater percentage||2790||3870|
|Same as above but substitute firebox area for grate area||16200||25200|