Data from "Six-Coupled Bogie Tank Locomotive: North Staffordshire Ry", Locomotive Magazine, Volume 20 (14 March 1914), p. 70; and "New Tank Locomotive, North Staffordshire Ry", Locomotive Magazine, Volume XX, No 266 (15 October 1914). Works numbers were 2040-2047.
This sextet brought superheaters to a relatively low driver design. Like many British locomotives at the time, the boiler had a Belpaire firebox. Its superheated steam merited 8" (203 mm) piston valves.
The class was retired by the LMS in 1934-1937.
Data from Ahrons (1927). See also "Superheater Tank Locomotive: North Staffordshire Railway", The Locomotive, Volume 23 (15 January 1917), p. 4. Works numbers were 2048, 2050 in October 1916; 2051 in December, 2049 in February 1917; 2052-2053 in 1918, and 2054-2055 in 1919.
The late JH Adams was the designer of this relatively large tank locomotive, which was designed for goods and mineral traffic, but would take heavy passenger trains if needed. It duplicated the "New C"(Locobase 20349) dimensions, including a Belpaire firebox and 8" (203 mm) piston valves, except for greater weight and 6" (152 m) taller drivers. The engines entered service in order of their road numbers except for 115, which was delivered after 117.
The class was retired by the LMS in 1936.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | New C | New F |
| Locobase ID | 20349 | 2356 |
| Railroad | North Staffordshire | North Staffordshire |
| Country | Great Britain | Great Britain |
| Whyte | 0-6-4T | 0-6-4T |
| Number in Class | 8 | 8 |
| Road Numbers | 30-31, 53, 70, 173-174, 4-5 | 114-121 |
| Gauge | Std | Std |
| Number Built | 8 | 8 |
| Builder | Stoke Works | Stoke Works |
| Year | 1914 | 1916 |
| Valve Gear | Walschaert | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 16 / 4.88 | 16 / 4.88 |
| Engine Wheelbase (ft / m) | 27.75 / 8.46 | 27.75 / 8.46 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 | 0.58 |
| Overall Wheelbase (engine & tender) (ft / m) | 27.25 / 8.31 | 27.25 / 8.31 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 116,480 / 52,835 | 124,320 / 56,391 |
| Engine Weight (lbs / kg) | 161,280 / 73,155 | 165,984 / 75,289 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 2700 / 10.23 | 2700 / 10.23 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.85 / 4 | 3.85 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 65 / 32.50 | 69 / 34.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 60 / 1676 | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 160 / 1100 | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 | 20" x 26" / 508x660 |
| Tractive Effort (lbs / kg) | 23,573 / 10692.55 | 21,430 / 9720.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.94 | 5.80 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | ||
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 11.21 / 3.42 | 11.21 / 3.42 |
| Firebox Area (sq ft / m2) | 129 / 11.98 | 129 / 11.98 |
| Grate Area (sq ft / m2) | 21 / 1.95 | 21 / 1.95 |
| Evaporative Heating Surface (sq ft / m2) | 1016 / 94.39 | 1016 / 94.39 |
| Superheating Surface (sq ft / m2) | 258 / 23.97 | 258 / 23.97 |
| Combined Heating Surface (sq ft / m2) | 1274 / 118.36 | 1274 / 118.36 |
| Evaporative Heating Surface/Cylinder Volume | 107.47 | 107.47 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3360 | 3360 |
| Same as above plus superheater percentage | 4032 | 4032 |
| Same as above but substitute firebox area for grate area | 24,768 | 24,768 |
| Power L1 | 6741 | 7415 |
| Power MT | 382.76 | 394.48 |