Data from "Staten Island Rapid Transit Notes", Railway and Locomotive Engineering, Volume XIX [19], No 2 (February 1906), pp.69-70.
This class of tender locomotives was rebuilt at the railroad's Clifton shops from former NY elevated railway Forney tanks. The original 0-4-4Ts bore road numbers 10-14. SIRT's master mechanic J H Clark, an "easterrn man, a skilled engineer of wide experience" designed the conversion. (Locobase isn't sure how to decode Clark's value as "an eastern man".)
He kept the frames and much of the running gear, but replaced the original firebox with a wide firebox "adapted for burning small coal", apparently with success, as R&LE claimed "some of them have saved their own price in coal already." Slide valves were the usual balanced Richardson type and the engines slowed and stopped using a double set of Eames's vacuum brakes.
The result was "altogether admirably adapted to suburban service."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | R |
| Locobase ID | 1440 |
| Railroad | Staten Island Rapid Transit (B&O) |
| Country | USA |
| Whyte | 2-4-0 |
| Number in Class | 5 |
| Road Numbers | 11-15 |
| Gauge | Std |
| Number Built | 5 |
| Builder | SIRT |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 96,000 / 43,545 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Tractive Effort (lbs / kg) | 11,729 / 5320.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 144 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 33 / 3.07 |
| 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 | 5280 |
| Same as above plus superheater percentage | 5280 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |