Data from "A Large Colliery Tank Locomotive," The Locomotive Magazine, Vol XVII, No 223 (15 March 1911), p. 67.
LM's editor pointed out the use of Walschaert gear and supposed it was the first colliery engine "in this country to be fitted with outside cylinders having outside piston valves acuated by that gear." He added that "in all respects" the Maden represented a "new era in the design and construction of locomotives of the 'colliery' type." Certainly its short wheelbase is to be noticed as are the perfectly rectangular tanks.
The Colliery was one of the smallest independent companies in the Lancashire coalfields and was located only a few miles west of Manchester.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Maden |
| Locobase ID | 16051 |
| Railroad | Astley & Tyldesley |
| Country | Great Britain |
| Whyte | 0-8-0T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Nasmyth Wilson |
| Year | 1911 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 12 / 3.66 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 12 / 3.66 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 120,400 / 54,613 |
| Engine Weight (lbs / kg) | 120,400 / 54,613 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 23" / 432x584 |
| Tractive Effort (lbs / kg) | 23,541 / 10678.03 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.11 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 17 / 1.58 |
| Evaporative Heating Surface (sq ft / m2) | 1054 / 97.92 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1054 / 97.92 |
| Evaporative Heating Surface/Cylinder Volume | 174.44 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2975 |
| Same as above plus superheater percentage | 2975 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |