Thomas Iron Company 2-4-0 "Porter" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Pawnee (Locobase 11844)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 13, p.5.
Works number was 7864 in March 1886. See also [
] for a history of the three small towns in this area.
Thomas Iron was located in Hokendauqua, Penna in the Lehigh Valley. Established in 1853, the firm produced iron in Hokendauqua until 1929. Its mile-and-a-half railroad connected with the Ironton Railroad at West Coplay. This little four-coupled with leading truck differed from most of the earlier versions of that wheel arrangement in having a Bissel truck. It was one of the TI RR's later acquisitions.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Pawnee |
| Locobase ID | 11844 |
| Railroad | Thomas Iron Company |
| Country | USA |
| Whyte | 2-4-0 |
| Number in Class | 1 |
| Road Numbers | 17 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1886 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4.67 / 1.42 |
| Engine Wheelbase (ft / m) | 11.25 / 3.43 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.42 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 800 / 3.03 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56 / 1422 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 |
| Tractive Effort (lbs / kg) | 3820 / 1732.72 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 111 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.58 / 2.01 |
| Firebox Area (sq ft / m2) | 35.84 / 3.33 |
| Grate Area (sq ft / m2) | 10.80 / 1 |
| Evaporative Heating Surface (sq ft / m2) | 319 / 29.65 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 319 / 29.65 |
| Evaporative Heating Surface/Cylinder Volume | 181.25 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1404 |
| Same as above plus superheater percentage | 1404 |
| Same as above but substitute firebox area for grate area | 4659 |
| Power L1 | 3435 |
| Power MT | |