Data from "The Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Vol V (June 1900), p. 90-91. works numbers were 3165-3167.
After producing the 0-6-0T profiled in Locobase 10147, Dubs turned immediately to the three passenger engines that shared the same boiler and grate design. (For some reason the firebox had slightly less area, possibly because it was shallower.) They were designed to pull the express service from Cheltenham south starting at 2:52 and Andover Junction north leaving 8 minutes later. They also hauled the American and Cape mail trains on Saturdays.
Data from "The Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Vol V (May 1900), p. 70. works numbers 2230-2232. Boiler pressure is an estimate.
A year after securing the 3 all-adhesion tanks from Dubs (Locobase 10142), the new company went to Manchester for some passenger tanks. In addition to larger cylinders, the new design also had taller drivers and a leading truck, which presumably meant smoother tracking through curves. Spidery-spoked wheels coupled with gleaming brass rods, a slender brass steam dome in the center of the boiler, a tall, quite thin stack with a cap, and a sheltered footplate completed the appearance.
#6 was later sold to the Isle of Wight Central Railway for 695 GPS.
Two years later came a larger younger brother; see Locobase 10144.
Data from "The Locomotives of the Midland & South-Western Junction Railway," The Locomotive Magazine, Vol V (May 1900), p. 70. works numbers 2465. Boiler pressure is an estimate.
This younger works-mate of the trio of passenger tanks that arrived on the SM & A two years earlier (Locobase 10143) had quite a bit more heating surface and a longer wheelbase, but otherwise resembled the earlier Beyer engines.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 10 | 5 | 8 |
Locobase ID | 10148 | 10143 | 10144 |
Railroad | Midland & South-Western Junction (MSWJ) | Swindon, Marlborough & Andover (MSWJ) | Swindon, Marlborough & Andover (MSWJ) |
Country | Great Britain | Great Britain | Great Britain |
Whyte | 2-4-0 | 2-4-0T | 2-4-0T |
Number in Class | 3 | 3 | 1 |
Road Numbers | 10-12 | 5-7 | 8 |
Gauge | Std | Std | Std |
Number Built | 3 | 3 | 1 |
Builder | Dubs & Co | Beyer, Peacock | Beyer, Peacock |
Year | 1894 | 1882 | 1884 |
Valve Gear | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 8 / 2.44 | 7.17 / 2.19 | 7.75 / 2.36 |
Engine Wheelbase (ft / m) | 15.58 / 4.75 | 14.50 / 4.42 | 16 / 4.88 |
Ratio of driving wheelbase to overall engine wheelbase | 0.51 | 0.49 | 0.48 |
Overall Wheelbase (engine & tender) (ft / m) | 15.58 / 4.75 | 14.50 / 4.42 | 16 / 4.88 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 34,720 / 15,749 | 32,480 / 14,733 | 34,720 / 15,749 |
Weight on Drivers (lbs / kg) | 53,200 / 24,131 | 60,480 / 27,433 | 68,992 / 31,294 |
Engine Weight (lbs / kg) | 80,024 / 36,298 | 79,016 / 35,841 | 90,048 / 40,845 |
Tender Loaded Weight (lbs / kg) | 67,760 / 30,735 | ||
Total Engine and Tender Weight (lbs / kg) | 147,784 / 67,033 | ||
Tender Water Capacity (gals / ML) | 3000 / 11.36 | 900 / 3.41 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 | 1.10 / 1 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 | 50 / 25 | 57 / 28.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 66 / 1676 | 66 / 1676 | 66 / 1676 |
Boiler Pressure (psi / kPa) | 150 / 1030 | 140 / 970 | 140 / 970 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 | 16" x 24" / 406x610 | 17" x 24" / 432x610 |
Tractive Effort (lbs / kg) | 13,399 / 6077.69 | 11,078 / 5024.90 | 12,506 / 5672.63 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.97 | 5.46 | 5.52 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 196 - 1.75" / 44 | 160 - 1.75" / 44 | |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | |||
Firebox Area (sq ft / m2) | 98.75 / 9.18 | 72.40 / 6.73 | 90 / 8.36 |
Grate Area (sq ft / m2) | 16.62 / 1.54 | 14.80 / 1.38 | 15.65 / 1.45 |
Evaporative Heating Surface (sq ft / m2) | 1039 / 96.56 | 952 / 88.48 | 1145 / 106.41 |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 1039 / 96.56 | 952 / 88.48 | 1145 / 106.41 |
Evaporative Heating Surface/Cylinder Volume | 164.79 | 170.45 | 181.60 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 2493 | 2072 | 2191 |
Same as above plus superheater percentage | 2493 | 2072 | 2191 |
Same as above but substitute firebox area for grate area | 14,813 | 10,136 | 12,600 |
Power L1 | 4011 | 3623 | 3896 |
Power MT | 332.43 | 264.13 | 248.99 |