Data from "The Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Volume V [5] (April 1900), p. 56; and "Tank Locomotive, Swindon, Marlborough and Andover Ry," Locomotive Magazine, Volume XXVIII [28] (15 May 1922), p 130-131. Works numbers were 1482-1484 in 1881.
These were the first of the SM&A's locomotives and thus the earliest of what would become the Midland & South Western Junction Railway. They were rebuilt in 1900 by the Avonside company.
Data from "Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Vol V (August 1900), p. 122. Works numbers were 4097-4102.
The LM article says these locomotives were purchased because development at the port of Southampton and the establishment of the Ludgershall military facility increased traffic demand. Note that they did NOT have Belpaire fireboxes.
Four more (4440-4443) would follow in 1903, but Locobase isn't sure if they were produced to the same design. They were taken into the Great Western during Grouping in 1923.
Data from "The Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Vol V (June 1900), p. 89. Works number was 3164, 3168
The first of the two replacing the first #4 (a single Fairlie described in Locobase 7374), this pair of locomotive shared their boiler and firebox design with the single 4-4-0 (Locobase 10145) from earlier in the year and the three 2-4-0s (Locobase 10148) that immediately followed (and preceded) these all-adhesion tanks on the production line. Its smaller drivers didn't prevent the railway from using it on passenger work because they had fitted the engine with an automatic vacuum brake system.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 1 | 19-24 | 4 (2nd) |
Locobase ID | 10142 | 10156 | 10147 |
Railroad | Swindon, Marlborough & Andover (MSWJ) | Midland & South-Western Junction (MSWJ) | Midland & South-Western Junction (MSWJ) |
Country | Great Britain | Great Britain | Great Britain |
Whyte | 0-6-0T | 0-6-0 | 0-6-0T |
Number in Class | 3 | 6 | 2 |
Road Numbers | 1-3 | 19-24 / 1003-1011, 1013 | 4, 13 / 825, 843 |
Gauge | Std | Std | Std |
Number Built | 3 | 6 | 2 |
Builder | Dubs & Co | Beyer, Peacock | Dubs & Co |
Year | 1881 | 1899 | 1894 |
Valve Gear | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 10.50 / 3.20 | 15.50 / 4.72 | 15.33 / 4.67 |
Engine Wheelbase (ft / m) | 10.50 / 3.20 | 15.50 / 4.72 | 15.33 / 4.67 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 10.50 / 3.20 | 15.33 / 4.67 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 24,640 / 11,177 | 29,288 / 13,285 | 34,720 / 15,749 |
Weight on Drivers (lbs / kg) | 70,784 / 32,107 | 84,224 / 38,203 | 98,560 / 44,706 |
Engine Weight (lbs / kg) | 70,784 / 32,107 | 84,224 / 38,203 | 98,560 / 44,706 |
Tender Loaded Weight (lbs / kg) | 62,776 / 28,475 | ||
Total Engine and Tender Weight (lbs / kg) | 147,000 / 66,678 | ||
Tender Water Capacity (gals / ML) | 900 / 3.41 | 4800 / 18.18 | 1200 / 4.55 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 | 4.40 / 4 | 1.40 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 | 47 / 23.50 | 55 / 27.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 48 / 1219 | 62.50 / 1588 | 55 / 1397 |
Boiler Pressure (psi / kPa) | 140 / 970 | 140 / 970 | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15.5" x 22" / 394x559 | 18" x 26" / 457x660 | 17" x 24" / 432x610 |
Tractive Effort (lbs / kg) | 13,104 / 5943.88 | 16,039 / 7275.18 | 16,079 / 7293.32 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.40 | 5.25 | 6.13 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 160 - 1.75" / 44 | 196 - 1.75" / 44 | |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | 9.25 / 2.82 | ||
Firebox Area (sq ft / m2) | 70 / 6.50 | 94.30 / 8.76 | 106.78 / 9.92 |
Grate Area (sq ft / m2) | 15 / 1.39 | 18 / 1.67 | 16.62 / 1.54 |
Evaporative Heating Surface (sq ft / m2) | 749 / 69.58 | 1079 / 100.28 | 1047 / 97.30 |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 749 / 69.58 | 1079 / 100.28 | 1047 / 97.30 |
Evaporative Heating Surface/Cylinder Volume | 155.89 | 140.91 | 166.06 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 2100 | 2520 | 2493 |
Same as above plus superheater percentage | 2100 | 2520 | 2493 |
Same as above but substitute firebox area for grate area | 9800 | 13,202 | 16,017 |
Power L1 | 2562 | 2953 | 3448 |
Power MT | 239.39 | 231.89 | 231.38 |