Data from H W Tyler, Captain, Royal Engineers, "North Staffordshire Railway", response to inquiry about accident that occurred 21 June 1861, communication to Parliament dated 26 October 1861, Parliamentary Papers By Great Britain Parliament. House of Commons, Northern Ireland, Parliament Published by HMSO, 1862, pp. 112-113.
Tyler notes the design of this locomotive, which began as a 2-4-0T, but was turned into a 2-2-2T to allow bi-directional running on a branch line. He comments that the resulting layout had deficiencies: "With outside cylinders overhanging the leading wheels, with a heavy tank overhanging the trailing wheels, and without a tender, this engine was not calculated to run steadily at high speeds."
The booked speed was to average 27 1/2 mph, but the engineer, who had a reputation for fast running, apparently was travelling much faster when he hit a weak spot in the rails and after careening along the rails for 70 or so meters, toppled over. The engineer was killed when he was thrown into a field, the fireman and brakeman were crushed in the wreckage and died later of their injuries.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 8 |
| Locobase ID | 9685 |
| Railroad | Lancashire & Yorkshire |
| Country | Great Britain |
| Whyte | 2-2-2T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | L & Y |
| Year | 1851 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 14 / 4.27 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 14 / 4.27 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 22,512 / 10,211 |
| Engine Weight (lbs / kg) | 58,016 / 26,316 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 58,016 / 26,316 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 38 / 19 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 100 / 690 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Tractive Effort (lbs / kg) | 5553 / 2518.80 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.05 |
| 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) | |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |