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).
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 | ||
---|---|---|
Class | G | KT |
Locobase ID | 3055 | 20183 |
Railroad | North Staffordshire | North Staffordshire |
Country | Great Britain | Great Britain |
Whyte | 4-4-0 | 4-4-0 |
Number in Class | 4 | 1 |
Road Numbers | 86-87, 170-171 | 38/599/5414 |
Gauge | Std | Std |
Number Built | 4 | 1 |
Builder | Stoke | Stoke |
Year | 1910 | 1912 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 9.50 / 2.90 | 9.50 / 2.90 |
Engine Wheelbase (ft / m) | 23.12 / 7.05 | 23.12 / 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 / 48,808 | 113,344 / 51,412 |
Tender Loaded Weight (lbs / kg) | 79,184 / 35,917 | 79,520 / 36,070 |
Total Engine and Tender Weight (lbs / kg) | 186,788 / 84,725 | 192,864 / 87,482 |
Tender Water Capacity (gals / ML) | 3840 / 14.55 | 3840 / 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 / 1829 | 72 / 1829 |
Boiler Pressure (psi / kPa) | 175 / 1210 | 160 / 1100 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 26" / 470x660 | 20" x 26" / 508x660 |
Tractive Effort (lbs / kg) | 18,384 / 8338.85 | 19,644 / 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 / 12.36 | 133 / 12.36 |
Grate Area (sq ft / m2) | 21 / 1.95 | 21 / 1.95 |
Evaporative Heating Surface (sq ft / m2) | 1225 / 113.81 | 1020 / 94.76 |
Superheating Surface (sq ft / m2) | 261 / 24.25 | |
Combined Heating Surface (sq ft / m2) | 1225 / 113.81 | 1281 / 119.01 |
Evaporative Heating Surface/Cylinder Volume | 151.44 | 107.89 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 3675 | 3360 |
Same as above plus superheater percentage | 3675 | 4032 |
Same as above but substitute firebox area for grate area | 23,275 | 25,536 |
Power L1 | 4907 | 8193 |
Power MT | 301.92 |