Data from Roy V Wright (Ed.) 1912 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1912), p. 157. Works numbers were 46934-46935 in January 1910.
This pair of small saddle-tanks worked for a heavy construction firm in New York City that built everything from bridges to piers to office buildings.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 11 |
| Locobase ID | 15034 |
| Railroad | Henry Steers Inc |
| Country | USA |
| Whyte | 0-4-2ST |
| Number in Class | 2 |
| Road Numbers | 11-12 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Alco-Rogers |
| Year | 1910 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 14.58 / 4.44 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.58 / 4.44 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 67,000 / 30,391 |
| Engine Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1160 / 4.39 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 165 / 1140 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Tractive Effort (lbs / kg) | 13,745 / 6234.63 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.87 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 106 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.67 / 3.56 |
| Firebox Area (sq ft / m2) | 54 / 5.02 |
| Grate Area (sq ft / m2) | 14.20 / 1.32 |
| Evaporative Heating Surface (sq ft / m2) | 697 / 64.75 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 697 / 64.75 |
| Evaporative Heating Surface/Cylinder Volume | 177.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2343 |
| Same as above plus superheater percentage | 2343 |
| Same as above but substitute firebox area for grate area | 8910 |
| Power L1 | 2985 |
| Power MT | 196.44 |