North Staffordshire 4-4-0 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class G (Locobase 3055)

Data from "North Staffordshire Railway", The Locomotive, Volume XVI [16] (15 July 1910), p. 135.

Classic British 4-4-0 designed by John H. Adams. Compared to other engines of its time, however, it possessed relatively modest proportions and a small boiler, even in relation to its relatively small grate. It was seen as "an innovation on the NSR" because they were the railway's first 4-4-0s. They were designed to handle summer traffic over the NSR and the through expresses to and from North Wales. They were big enough to handle such trains on the Crewe and Llandudno Junction without stopping for water.

Like many other British engines of the time, it had a Belpaire boiler, rounded steam dome, and a handsome livery (in this case a dark red).


Class KT (Locobase 20183)

Data from "Four-Coupled Superheater Express Engine, North Staffordshire Railway", Locomotive Magazine, Volume XIX [19], No. 251 (15 July 1913).

John H. Adams took the 1910 4-4-0 design described in Locobase 3055 (the first 4-4-0s on the railway) and squeezed a surprisingly sizable superheater in the boiler. Trading in small tubes for the flues led to very little reduction in overall heating surface area.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassGKT
Locobase ID3055 20183
RailroadNorth StaffordshireNorth Staffordshire
CountryGreat BritainGreat Britain
Whyte4-4-04-4-0
Number in Class41
Road Numbers86-87, 170-17138/599/5414
GaugeStdStd
Number Built41
BuilderStokeStoke
Year19101912
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.50 / 2.90 9.50 / 2.90
Engine Wheelbase (ft / m)23.12 / 7.0523.12 / 7.05
Ratio of driving wheelbase to overall engine wheelbase 0.41 0.41
Overall Wheelbase (engine & tender) (ft / m)44.93 / 13.69
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)71,663 / 32,506
Engine Weight (lbs / kg)107,604 / 48,808113,344 / 51,412
Tender Loaded Weight (lbs / kg)79,184 / 35,91779,520 / 36,070
Total Engine and Tender Weight (lbs / kg)186,788 / 84,725192,864 / 87,482
Tender Water Capacity (gals / ML)3840 / 14.553840 / 14.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.50 / 5 5.50 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)60 / 30
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 182972 / 1829
Boiler Pressure (psi / kPa)175 / 1210160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 26" / 470x66020" x 26" / 508x660
Tractive Effort (lbs / kg)18,384 / 8338.8519,644 / 8910.38
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.90
Heating Ability
Tubes (number - dia) (in / mm)112 - 1.875" / 48
Flues (number - dia) (in / mm)18 - 5" / 127
Flue/Tube length (ft / m)11.19 / 3.41
Firebox Area (sq ft / m2)133 / 12.36133 / 12.36
Grate Area (sq ft / m2)21 / 1.9521 / 1.95
Evaporative Heating Surface (sq ft / m2)1225 / 113.811020 / 94.76
Superheating Surface (sq ft / m2)261 / 24.25
Combined Heating Surface (sq ft / m2)1225 / 113.811281 / 119.01
Evaporative Heating Surface/Cylinder Volume151.44107.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation36753360
Same as above plus superheater percentage36754032
Same as above but substitute firebox area for grate area23,27525,536
Power L149078193
Power MT301.92

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