Data from Samuel Rendell (M. I Mech.E), "The Steam Locomotive: Fifty Years Ago and Now", read Saturday, 13 January 1906 and published in the Transactions of the Manchester Association of Engineers 1906 (January to March). See also "Old Locomotives, Lancashire and Yorkshire Railway", The Locomotive Magazine, Vol XIII (15 January 1907), p. 16.
William Jenkins's design was typical of L & Y engines of the day, being relatively low-powered and soon overmatched by traffic demands. The LM report offers a photograph of the Marshall, one of the L & Y locomotives of the time, although it cannot be confirmed as belonging to the class described by Rendell.
Data from C J Bowen Cooke, "British Locomotives", (London: Whitaker & Co, 1894).
Bowen Cooke says that Aspinall designed these tanks to handle heavy passenger traffic, especialy between Manchester and Oldham, Rochdale, and Blackburn. Half of the 24 1/2 miles between Manchester and Blackburn lay on rising gradients of about 1.35% and the class was expected to move 13 coaches that, with the engine, weight 250 long tons.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | unknown | unknown |
| Locobase ID | 8404 | 8968 |
| Railroad | Lancashire & Yorkshire | Lancashire & Yorkshire |
| Country | Great Britain | Great Britain |
| Whyte | 2-4-0 | 2-4-0T |
| Number in Class | ||
| Road Numbers | ||
| Gauge | Std | Std |
| Number Built | ||
| Builder | Horwich | |
| Year | 1855 | 1892 |
| Valve Gear | Stephenson | Joy |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 8.25 / 2.51 | 16.33 / 4.98 |
| Engine Wheelbase (ft / m) | 14.33 / 4.37 | 16.33 / 4.98 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,096 / 11,837 | 37,184 / 16,866 |
| Weight on Drivers (lbs / kg) | 42,952 / 19,483 | 71,008 / 32,209 |
| Engine Weight (lbs / kg) | 61,992 / 28,119 | 101,248 / 45,925 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 101,248 / 45,925 | |
| Tender Water Capacity (gals / ML) | 1608 / 6.09 | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 | 59 / 29.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 69 / 1753 | 68 / 1727 |
| Boiler Pressure (psi / kPa) | 100 / 690 | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 6098 / 2766.01 | 16,848 / 7642.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.04 | 4.21 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 140 - 2.125" / 54 | 220 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | ||
| Firebox Area (sq ft / m2) | 86 / 7.99 | 107.68 / 10.01 |
| Grate Area (sq ft / m2) | 14.40 / 1.34 | 18.75 / 1.74 |
| Evaporative Heating Surface (sq ft / m2) | 895 / 83.18 | 1216 / 113.01 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 895 / 83.18 | 1216 / 113.01 |
| Evaporative Heating Surface/Cylinder Volume | 198.90 | 158.80 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1440 | 3000 |
| Same as above plus superheater percentage | 1440 | 3000 |
| Same as above but substitute firebox area for grate area | 8600 | 17,229 |
| Power L1 | 3386 | 4154 |
| Power MT | 347.59 | 257.94 |