Pittsburgh, McKeesport & Youghiogheny 2-8-0 "Consolidation" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 271 (Locobase 2438)
Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at [
] (accessed 22 August 2005). Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
Builder information from B Rumary list supplied by Allen Stanley in March 2004. Works numbers were 1756-1759 (December 1897-January 1898) and 1939-1945 (June 1899).
Although the data come from the St Louis-San Francisco era, the locomotives started out on the PM &Y. They were taken up by the New York Central and renumbered 9400-9410. The Pittsburgh & Lake Erie locomotives (121 et seq) later taken in the NYC as the 9300-9314 (Locobase 7072) were of the same design.
Rumary details the 9400 class's subsequent dispositions.
Successor roads ranged as widely as the Moon Run/Montour in Pennsylvania to the Muscle Shoals, Birmingham & Pensacola in Alabama to the St Louis-San Francisco to the Montana, Wyoming & Southern. Scotts Run railroad had fivefrom a variety of orders.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 271 |
| Locobase ID | 2438 |
| Railroad | Pittsburgh, McKeesport & Youghiogheny |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 11 |
| Road Numbers | 271-281/870-871 |
| Gauge | Std |
| Number Built | 11 |
| Builder | Pittsburgh |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.67 / 4.47 |
| Engine Wheelbase (ft / m) | 22.67 / 6.91 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.65 |
| Overall Wheelbase (engine & tender) (ft / m) | 52.10 / 15.88 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 142,000 / 64,410 |
| Engine Weight (lbs / kg) | 157,500 / 71,441 |
| Tender Loaded Weight (lbs / kg) | 111,700 / 50,666 |
| Total Engine and Tender Weight (lbs / kg) | 269,200 / 122,107 |
| Tender Water Capacity (gals / ML) | 4600 / 17.42 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9.60 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 |
| Tractive Effort (lbs / kg) | 31,200 / 14152.10 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.55 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 236 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.25 / 4.04 |
| Firebox Area (sq ft / m2) | 162.50 / 15.10 |
| Grate Area (sq ft / m2) | 25.50 / 2.37 |
| Evaporative Heating Surface (sq ft / m2) | 1800 / 167.22 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1800 / 167.22 |
| Evaporative Heating Surface/Cylinder Volume | 190.48 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4590 |
| Same as above plus superheater percentage | 4590 |
| Same as above but substitute firebox area for grate area | 29,250 |
| Power L1 | 4230 |
| Power MT | 262.69 |