Data from Arthur Mellen Wellington, The Economic Theory of the Location of Railways: An Analysis of the Location of Railways (New York: Chapman & Hall, limited, 1887), 407.
Wellington used this locomotive and another Mason from 1884 in a table of typical North American "American" engines. He gave no particulars about the railroad it served.
Data from Arthur Mellen Wellington, The Economic Theory of the Location of Railways: An Analysis of the Location of Railways (New York: Chapman & Hall, Ltd, 1887), 407. See also See also T Everett Austin, "Fast Passenger Locomotives," delivered 2 May 1885 to the Engineer's Club of Philadelphia, Proceedings, Volume 5, No 2 (August 1885), p. 100.
Wellington used this locomotive and another Mason from 1873 (Locobase 8936) in a table of typical North American "American" engines. He gave no particulars about the railroad it served. Austin comments: "In these engines care has been taken to increase the size of all wearing parts, new cylinders and all other working parts being carefully gone over, and we may expect from these engines as good performances as are possible to be got out of the standard American type."
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | unknown | unknown |
| Locobase ID | 8936 | 8937 |
| Railroad | unk | unk |
| Country | USA | USA |
| Whyte | 4-4-0 | 4-4-0 |
| Number in Class | ||
| Road Numbers | ||
| Gauge | Std | Std |
| Number Built | ||
| Builder | William Mason | William Mason |
| Year | 1873 | 1884 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 8 / 2.44 | 9 / 2.74 |
| Engine Wheelbase (ft / m) | 22 / 6.71 | 23.33 / 7.11 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 40,000 / 18,144 | 68,000 / 30,844 |
| Engine Weight (lbs / kg) | 62,000 / 28,123 | 102,000 / 46,266 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 2700 / 10.23 | 4300 / 16.29 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 | 57 / 28.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 66 / 1676 | 68.50 / 1676 |
| Boiler Pressure (psi / kPa) | 120 / 830 | 120 / 830 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 10,719 / 4862.06 | 11,579 / 5252.15 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.73 | 5.87 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 212 - 2" / 51 | |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 11.17 / 3.40 | |
| Firebox Area (sq ft / m2) | 105 / 9.76 | 145 / 13.48 |
| Grate Area (sq ft / m2) | 16.38 / 1.52 | 18.90 / 1.76 |
| Evaporative Heating Surface (sq ft / m2) | 1011 / 93.96 | 1375 / 127.79 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1011 / 93.96 | 1375 / 127.79 |
| Evaporative Heating Surface/Cylinder Volume | 160.22 | 194.48 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1966 | 2268 |
| Same as above plus superheater percentage | 1966 | 2268 |
| Same as above but substitute firebox area for grate area | 12,600 | 17,400 |
| Power L1 | 3213 | 4069 |
| Power MT | 354.17 | 263.84 |