Pennsylvania 2-4-6 Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Old L/"Jumbo" (Locobase 5489)
Data from [
] (Viewed 11 April 2003). See also the Christopher T Baer, "A General Chronology Of The Pennsylvania Railroad Company, Its Predecessors And Successors and Its Historical Context -- 1882", Pennsylvania Railroad Historical Society, last updated November 2015, archived online at [
], last accessed 12 January 2018. (Thanks to Chris Hohl for his 3 January 2018 email noting the L's road number.). Works number was 645 in 1882.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | Old L/"Jumbo" |
| Locobase ID | 5489 |
| Railroad | Pennsylvania (PRR) |
| Country | USA |
| Whyte | 2-4-6T |
| Number in Class | 1 |
| Road Numbers | 4 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Altoona |
| Year | 1882 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 31.33 / 9.55 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.22 |
| Overall Wheelbase (engine & tender) (ft / m) | 31.33 / 9.55 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 32,500 / 14,742 |
| Weight on Drivers (lbs / kg) | 59,750 / 27,102 |
| Engine Weight (lbs / kg) | 124,100 / 56,291 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 124,100 |
| Tender Water Capacity (gals / ML) | 1680 / 6.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 62 / 1575 |
| Boiler Pressure (psi / kPa) | 125 / 8.60 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 11,886 / 5391.41 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.03 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 171 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.94 / 4.55 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 21.05 / 1.96 |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2631 |
| Same as above plus superheater percentage | 2631 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |