Data from "Four-wheeled Locomotive for the Islip Iron Co", The Locomotive Magazine, Volume XX [20] (15 September 1914), p. 123.
The LM report described this little tank as a "remarkably powerful engine" given the loading gauge limitations and maximum axle loading. To distribute the weight as evenly as possible over both axles, the builder put the water tanks well forward with the result that, said LM, "the engine rides very steadily for a four-wheeled locomotive.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 20353 |
| Railroad | Islip Iron Company |
| Country | Great Britain |
| Whyte | 0-4-0T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 1 |
| Builder | WG Bagnall |
| Year | 1914 |
| Valve Gear | Bagnall Price |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.25 / 1.60 |
| Engine Wheelbase (ft / m) | 5.25 / 1.60 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5.25 / 1.60 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 16,576 / 7519 |
| Weight on Drivers (lbs / kg) | 32,144 / 14,580 |
| Engine Weight (lbs / kg) | 32,144 / 14,580 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 32,144 / 14,580 |
| Tender Water Capacity (gals / ML) | 360 / 1.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.34 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 27 / 13.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 31 / 787 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 14" / 229x356 |
| Tractive Effort (lbs / kg) | 4664 / 2115.56 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.89 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 62 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8 / 2.44 |
| Firebox Area (sq ft / m2) | 27 / 2.51 |
| Grate Area (sq ft / m2) | 4.90 / 0.46 |
| Evaporative Heating Surface (sq ft / m2) | 271 / 25.18 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 271 / 25.18 |
| Evaporative Heating Surface/Cylinder Volume | 262.89 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 735 |
| Same as above plus superheater percentage | 735 |
| Same as above but substitute firebox area for grate area | 4050 |
| Power L1 | 3052 |
| Power MT | 418.65 |