Data from "Passenger Locomotives, Edinburgh & Glasgow Railway" The Locomotive Magazine, Volume IX (12 September 1903), p. 157. Boiler pressure is an estimate.
An assorted class in terms of builders and building dates: Beyer, Peacock supplied 237-238 in 1859, 233-234 in 1861, 235 from Cowlairs as an Edinburgh & Glasgow engine, and 236 and 239 as NBR engines. In their original state, the dome rode on the firebox.
The rebuilding that started in 1881 moved the dome to the center of barrel at the same time that the crew received a narrow sheltering eave extending back from the weatherboard. At the time of writing in 1903, the author noted that this class served mainly the West of Fife section, from Stirling to Dunfermline, Thornton, and Ladybank "'...with light and fast trains, a service which, notwithstanding their age, they still perform in a satisfactory manner."
Data from "The Locomotives of the Great Eastern Railway," The Locomotive Magazine, Vol XV (15 June 1909), p. 107. See also Steamindex ([], last accessed 2 August 2009). Dubs works numbers were 32-37 in 1866. Neilson's works numbers were 1290-1293, 1297-1299 in 1866 and 1350-1354 in 1867.
Locobase 10712 shows the five engines of this class that went to the Great Eastern.
Data from "Rebuilt 2-4-0 Passenger Engines, North British Ry", Locomotive Magazine, Volume XXII [22] (15 February 1916), p. 19; and "The Wheatley E7 (NBR Class P) 2-4-0 Locomotives", archived in Richard Marsden's LNER Encyclopedia at [], last accessed 10 April 2019.
Reid rebuilt six of these little passenger engines in 1915, which Wheatley originally brought into service and Holmes had later rebuilt the first time.
This time, Marsden points out, Reid was reworking locomotives that had been reassigned to local passenger trains and pilot (helper) duties. LNER took over the engines over in 1923 and only briefly, putting three to work on the Berwickshire branch to St Boswells, the other three hauling Fife locals.
Just two years later, the LNER began disposing of the 50-year-old, twice revamped locomotives. 10247 was last to go in 1927 after operating for a year out of Bathgate on the Morningside branch.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 233 | 90 | P rebuilt by Reid |
Locobase ID | 10368 | 10713 | 5204 |
Railroad | North British | North British | North British |
Country | Great Britain | Great Britain | Great Britain |
Whyte | 2-4-0 | 2-4-0 | 2-4-0 |
Number in Class | 7 | 18 | 6 |
Road Numbers | 233-239 | 429, 1239, 1245-1249, 1256 | |
Gauge | Std | Std | Std |
Number Built | 7 | 18 | |
Builder | several | several | Cowlairs |
Year | 1881 | 1866 | 1915 |
Valve Gear | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 7.75 / 2.36 | ||
Engine Wheelbase (ft / m) | 15 / 4.57 | ||
Ratio of driving wheelbase to overall engine wheelbase | 0.52 | ||
Overall Wheelbase (engine & tender) (ft / m) | 32.37 / 9.87 | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 24,192 / 10,973 | 32,964 / 14,952 | |
Weight on Drivers (lbs / kg) | 45,472 / 20,626 | 58,016 / 26,316 | |
Engine Weight (lbs / kg) | 68,208 / 30,939 | 82,908 / 37,606 | |
Tender Loaded Weight (lbs / kg) | 40,432 / 18,340 | 58,912 / 26,722 | |
Total Engine and Tender Weight (lbs / kg) | 108,640 / 49,279 | 141,820 / 64,328 | |
Tender Water Capacity (gals / ML) | 2064 / 7.82 | ||
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 38 / 19 | 48 / 24 | |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 72 / 1829 | 72.50 / 1842 | 72 / 1829 |
Boiler Pressure (psi / kPa) | 150 / 1030 | 140 / 970 | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 | 16" x 20" / 406x508 | 17" x 24" / 432x610 |
Tractive Effort (lbs / kg) | 9067 / 4112.73 | 8404 / 3811.99 | 12,283 / 5571.48 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.41 | 4.72 | |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 171 - 1.75" / 44 | 147 - 2.125" / 54 | 202 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | 10.29 / 3.14 | 10.33 / 3.15 | |
Firebox Area (sq ft / m2) | 66 / 6.13 | 85 / 7.90 | 102 / 9.48 |
Grate Area (sq ft / m2) | 15.75 / 1.46 | 14.90 / 1.38 | 16.75 / 1.56 |
Evaporative Heating Surface (sq ft / m2) | 924 / 85.87 | 925 / 85.97 | 1061 / 98.57 |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 924 / 85.87 | 925 / 85.97 | 1061 / 98.57 |
Evaporative Heating Surface/Cylinder Volume | 198.53 | 198.74 | 168.28 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 2363 | 2086 | 2513 |
Same as above plus superheater percentage | 2363 | 2086 | 2513 |
Same as above but substitute firebox area for grate area | 9900 | 11,900 | 15,300 |
Power L1 | 4850 | 4907 | 4485 |
Power MT | 475.81 | 340.86 |