National Coal Board 0-6-0 Locomotives in Great_Britain
Class Details by Steve Llanso of Sweat House Media
Class Empress (Locobase 8572)
Data from [
], accessed 14 July 2007. Works number was 3061.
One of many coal-mine shunters delivered to the NCB, this engine first worked for the Measham Colliery and later for Cadly Hill Colliery. Its saddle tank was quite angular and its valves were operated by outside Walschaerts gear.
In 1989, Empress was restored to operation in a shed at the Rye House Power Station at Hoddeston in Hertfordshire. Maintained by Mangapps Farm Railway Museum, the Empress was a steady contributor until it entered overhaul in 2000. When the boiler underwent its hydraulic test in October 2013, water emerged from holes in the bottom of the water tank. According to Essexsteam.org, the tank had to be turned upside to allow welding the new base in place. Steam tests in May 2014 proved her ready for service.
Empress conducted eight trips in 2014, which exposed "a few problems", but she was ready for the 2015 Easter Steam Gala and was loaned to the Lavender Line.
Florence 1 & 2 (the latter was works #3059) were others in this NCB batch; Florence 2 eventually wound up on the Foxfield Steam Railway.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Empress |
| Locobase ID | 8572 |
| Railroad | National Coal Board |
| Country | Great Britain |
| Whyte | 0-6-0ST |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 3 |
| Builder | WG Bagnall |
| Year | 1954 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.50 / 3.20 |
| Engine Wheelbase (ft / m) | 10.50 / 3.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 10.50 / 3.20 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 92,960 / 42,166 |
| Engine Weight (lbs / kg) | 92,960 / 42,166 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 92,960 / 42,166 |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42.50 / 1080 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 22,118 / 10032.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.20 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 79.50 / 7.39 |
| Grate Area (sq ft / m2) | 15 / 1.39 |
| Evaporative Heating Surface (sq ft / m2) | 793 / 73.70 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 793 / 73.70 |
| Evaporative Heating Surface/Cylinder Volume | 141.99 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2700 |
| Same as above plus superheater percentage | 2700 |
| Same as above but substitute firebox area for grate area | 14,310 |
| Power L1 | 2718 |
| Power MT | 193.38 |