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, 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 Sweat House Media

Locobase ID8572
RailroadNational Coal Board
CountryGreat Britain
Number in Class3
Road Numbers
Number Built3
BuilderWG Bagnall
Valve GearWalschaert
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 wheelbase1
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 / 12.40
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 Volume141.99
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2700
Same as above plus superheater percentage2700
Same as above but substitute firebox area for grate area14,310
Power L12718
Power MT193.38

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