These saddle-tankers served Stewart and Lloyds until the end of steam at that iron-ore railway in 1969. Additional information and data from [] (15 February 2004). This site says that the design was supplied by several builders over many years and was drawn originally from a Manning Wardle locomotive.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Colwyn |
| Locobase ID | 4868 |
| Railroad | Stewart & Lloyds |
| Country | Great Britain |
| Whyte | 0-6-0ST |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 3 |
| Builder | Kitson & Co |
| Year | 1933 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| 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) | 85,120 / 38,610 |
| Engine Weight (lbs / kg) | 85,120 / 38,610 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 960 / 3.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 18,237 / 8272.17 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.67 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 14 / 1.30 |
| Evaporative Heating Surface (sq ft / m2) | 759 / 70.54 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 759 / 70.54 |
| Evaporative Heating Surface/Cylinder Volume | 148.25 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2240 |
| Same as above plus superheater percentage | 2240 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |