Tremont & Gulf 2-4-0 "Porter" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Bob (Locobase 12567)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 24, p. 105. Works number was 19799 in November 1901. See also Jack M Willis, "Early railroads built for mills: Tremont operations supported by T&G Railroad in NE Louisiana," archived at [
], last accessed 25 July 2010. Also see Mildred King Shell "T&G Railway connected forestry in region" at [], last accessed 29 June 2012.
The T&G was a 9-mile (14.5 km) logging road that linked the stands of pine in northwest Louisiana to the junction with the Vicksburg, Shreveport & Pacific Railroad. With other branch lines, the T&G eventually covered 98.5 (158 km) miles.
Like most forest-dwelling wood-burners, this engine used a 12' (305 mm) Radley & Hunter spark-arresting balloon stack.
Bob was the first and smallest of the T & G's engines. After some service with the T & G, the 11 moved onto the Cartwright Logging Company. From there, the engine went to locomotive rebuilder/reseller Birmingham Rail & Locomotive. BR&L reconditioned the little six-wheeler and sold it to Arabi, Louisiana's Saint Bernard Cypress Company.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Bob |
| Locobase ID | 12567 |
| Railroad | Tremont & Gulf |
| Country | USA |
| Whyte | 2-4-0 |
| Number in Class | 1 |
| Road Numbers | 11 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.50 / 1.68 |
| Engine Wheelbase (ft / m) | 12.42 / 3.79 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 33,000 / 14,969 |
| Engine Weight (lbs / kg) | 41,000 / 18,597 |
| Tender Loaded Weight (lbs / kg) | 33,000 / 14,969 |
| Total Engine and Tender Weight (lbs / kg) | 74,000 / 33,566 |
| Tender Water Capacity (gals / ML) | 1500 / 5.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 8393 / 3807.01 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.93 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 118 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.92 / 2.11 |
| Firebox Area (sq ft / m2) | 45.70 / 4.25 |
| Grate Area (sq ft / m2) | 11.10 / 1.03 |
| Evaporative Heating Surface (sq ft / m2) | 414 / 38.48 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 414 / 38.48 |
| Evaporative Heating Surface/Cylinder Volume | 175.42 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1776 |
| Same as above plus superheater percentage | 1776 |
| Same as above but substitute firebox area for grate area | 7312 |
| Power L1 | 3049 |
| Power MT | 407.39 |