Royal Ordnance Factory #6 0-4-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class 8 (Locobase 11191)

Data from East Essex Locomotive Preservation Society website ([], last accessed 3 April 2010). Works number was 2157.

A brief glance at the beautifully restored and painted #8 tells you this was an engine designed for close-quarters working. Over a closely spaced wheelbase sits a tightly packed saddle tank with straight sides above which rise two stubby domes, a short stack and a small cab.

Ordered by the Ministry of Supply and placed in service at ROF #6 Thorp Arch Factory near Harrogate, #8 served out World War II at several ROF installations before returning to Barclays in 1946 to be converted to coal burning. It then served the Comrie Colliery and other collieries until its retirement in 1972.

Nearly scrapped in 1977, #8's sentence was commuted when it was bought by Richard & Anthony Goulding to be restored and returned to service at Magnapps Farm Railway at Burnham on Crouch in Essex. As of 2010, it was once again undergoing restoration.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID11191
RailroadRoyal Ordnance Factory #6
CountryGreat Britain
Number in Class1
Road Numbers
Number Built1
BuilderAndrew Barclay
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.50 / 1.68
Engine Wheelbase (ft / m) 5.50 / 1.68
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m) 5.50 / 1.68
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)50,960 / 23,115
Engine Weight (lbs / kg)50,960 / 23,115
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)50,960 / 23,115
Tender Water Capacity (gals / ML)864 / 3.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41 / 1041
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14" x 22" / 356x559
Tractive Effort (lbs / kg)14,303 / 6487.74
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.56
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)10.25 / 0.95
Evaporative Heating Surface (sq ft / m2)542 / 50.37
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)542 / 50.37
Evaporative Heating Surface/Cylinder Volume138.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1640
Same as above plus superheater percentage1640
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright ©
Wes Barris