Data from [], the 4-4-0 entries in Richard Marsden's online LNER Encyclopedia, last accessed on 1 March 2006.
Locobase is a little surprised that Thomas Parker's three "stopgap" locomotives held on to service life for so long. They evolved from the 6D 2-4-0s that had given rise to complaints about poor riding. Substituting a bogie for the single-axle leading truck smoothed the ride; as such, these were then 6DB[ogies]. Parker didn't like the double-frame construction for the driving axles and ended production of the 6DBs in favor of the Class 2 engines based on the Kitson exhibit at the 1887 Manchester Exhibition (see Locobase 7472).
After a short period as the Manchester-London (King's Cross) express engines, they moved to Liverpool for the cross-country Liverpool-Hull service. When the GCR was subsumed under the LNER, the latter disposed of two D8s almost immediately and scrapped the third by 1926.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 6DB/D8 |
| Locobase ID | 7473 |
| Railroad | Manchester, Lincolnshire & Sheffield |
| Country | Great Britain |
| Whyte | 4-4-0 |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 3 |
| Builder | Gorton |
| Year | 1888 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 44.46 / 13.55 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,616 / 16,155 |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 81.50 / 2070 |
| Boiler Pressure (psi / kPa) | 160 / 1090 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 14,057 / 6376.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 190 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.08 / 3.38 |
| Firebox Area (sq ft / m2) | 99 / 9.20 |
| Grate Area (sq ft / m2) | 18.30 / 1.70 |
| Evaporative Heating Surface (sq ft / m2) | 1063 / 98.76 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1063 / 98.76 |
| Evaporative Heating Surface/Cylinder Volume | 138.82 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2928 |
| Same as above plus superheater percentage | 2928 |
| Same as above but substitute firebox area for grate area | 15,840 |
| Power L1 | 4422 |
| Power MT | |