Great Central 0-6-2 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class N5 - superheated (Locobase 20531)

Data from "Rebuilt 0-6-2 Tank Loco Gt. Central Ry", Locomotive Magazine, Volume XXII [22], No 282 (15 February 1916),

10 N5's (Locobase 6962) were fitted with George Robinson's design of a superheater from 1915-1923. The relatively meager amount of superheater area did not offset the sizable loss of small tubes. Another change removed the trailing axle's radial axle boxes and their curved guides in favor of a simpler pony truck joined by a radial arm to a central pivot.

Although the rebuild wasn't unsuccessful, only the ten were converted and they were rebuilt with saturated boilers within a decade or two.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassN5 - superheated
Locobase ID20531
RailroadGreat Central
CountryGreat Britain
Number in Class10
Road Numbers1000
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)22.50 / 6.86
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)39,984 / 18,136
Weight on Drivers (lbs / kg)121,520 / 55,121
Engine Weight (lbs / kg)145,600 / 66,043
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)145,600 / 66,043
Tender Water Capacity (gals / ML)2400
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)68 / 34
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61 / 1549
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)18" x 26" / 457x660
Tractive Effort (lbs / kg)18,781 / 8518.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.47
Heating Ability
Tubes (number - dia) (in / mm)102 - 1.75" / 44
Flues (number - dia) (in / mm)15 - 5.25" / 133
Flue/Tube length (ft / m)11.58 / 3.53
Firebox Area (sq ft / m2)99 / 9.20
Grate Area (sq ft / m2)18.40 / 1.71
Evaporative Heating Surface (sq ft / m2)880 / 81.75
Superheating Surface (sq ft / m2)113 / 10.50
Combined Heating Surface (sq ft / m2)993 / 92.25
Evaporative Heating Surface/Cylinder Volume114.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2944
Same as above plus superheater percentage3268
Same as above but substitute firebox area for grate area17,582
Power L15081
Power MT276.54

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Wes Barris