Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), p. 1000. See also "Switching Locomotives for the Monongahela Connecting RR", Railway and Engineering News, Vol 53 (30 August 1913), p. 830. (Thanks to Chris Hohl for his 24 January 2017 email correcting the valve gear). Works numbers were 5250-5252 in March 1913.
This railroad was a subsidiary of the Jones & Laughlin Steel Company and operated in Pittsburgh. At the time of their delivery, these three eight-coupled switchers were the largest locomotives yet built by H K Porter (also of Pittsburgh). The Security sectional brick arch support included arch tubes that contributed to the direct heating surface area.
The 201 was later sold to the Aliquippa & Southern as their 220.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 200 |
| Locobase ID | 15007 |
| Railroad | Monongahela Connecting |
| Country | USA |
| Whyte | 0-8-0 |
| Number in Class | 3 |
| Road Numbers | 200-202 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Porter |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 14 / 4.27 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 44 / 13.41 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 195,000 / 88,451 |
| Engine Weight (lbs / kg) | 195,000 / 88,451 |
| Tender Loaded Weight (lbs / kg) | 114,000 / 51,710 |
| Total Engine and Tender Weight (lbs / kg) | 309,000 / 140,161 |
| Tender Water Capacity (gals / ML) | 5800 / 21.97 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 81 / 40.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 185 / 1280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 23" x 28" / 584x711 |
| Tractive Effort (lbs / kg) | 46,584 / 21130.17 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.19 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 216 - 2" / 51 |
| Flues (number - dia) (in / mm) | 30 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 192 / 17.84 |
| Grate Area (sq ft / m2) | 42 / 3.90 |
| Evaporative Heating Surface (sq ft / m2) | 2204 / 204.76 |
| Superheating Surface (sq ft / m2) | 470 / 43.66 |
| Combined Heating Surface (sq ft / m2) | 2674 / 248.42 |
| Evaporative Heating Surface/Cylinder Volume | 163.74 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7770 |
| Same as above plus superheater percentage | 9169 |
| Same as above but substitute firebox area for grate area | 41,914 |
| Power L1 | 8469 |
| Power MT | 382.99 |