Data from "Goods Engine and Tender for the Bengal Nagpur Railway", Vulcan Foundry Locomotive Catalogue, No. 4, found on Flicker's Historical Locomotive Images website at []. (Many thanks to Jorge Cerezo Toledo for his 26 June 2021 email containing links to several sites including the Vulcan Catalogue referred to above.). Works numbers were 2225 - 2239, 2280 - 2289 in 1907)
More than two dozen Consolidations from Newton-le-Willowws joined other builders' 2-8-0 on the BNR's broad-gauge lines. Like many Vulcan products, the design used a Belpaire firebox of good proportions that included a sizable grate.
The 334s inspired a superheated version in 1914; see Locobase 20306.
Data from "Consolidated Goods Engine, Bengal Nagpur Ry", The Locomotive Magazine,Vol X (14 May 1904), p. 79.
Clearly, Indian rail traffic was picking up throughout the Crown Colony in early 1900s if the size of recent locomotives is an indicator. The North British engines produced for the Great Indian Peninsula (Locobase 10450) were matched in basic power by these 2-8-0s supplied to the BNR in the same year. They were the product of specifications drafted by the BNR's consulting engineer Sir John Wolfe Barry, and included a Belpaire firebox notable for its length and width. The design seems to have been nicely balanced in terms of firebox area, heating surface, and cylinder volume.
NB: Tube length is an estimate derived by subtracting the known firebox heating surface from the known evaporative heating surface and calculating the length need to provide the surface area of the given number and diameter of tubes.
Data from "Consolidated Goods Engine, Bengal Nagpur Ry", The Locomotive Magazine,Vol XX [20], No 265 (15 September 1914), p. 79. Builders were North British Locomotive Company and Robert Stephenson and Company.
A decade after the first Consolidations arrived on the BNR (Locobase 20914), the railway's consulting engineer Sir John Wolfe Barry reworked the boiler to make room for a substantial amount of superheater area. The already capacious Belpaire firebox remained the same, but Barry also increased cylinder diameter by an inch (25.4 mm). LM's report does not say how many of the engines were fitted with Schmidt superheaters and how many had Robinsons installed.
NB: Tube length is an estimate derived by subtracting the known firebox heating surface from the known evaporative heating surface and calculating the length need to provide the surface area of the given number and diameter of tubes.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 334 | unknown | unknown |
Locobase ID | 20914 | 10452 | 20306 |
Railroad | Bengal Nagpur | Bengal Nagpur | Bengal Nagpur |
Country | India | India | India |
Whyte | 2-8-0 | 2-8-0 | 2-8-0 |
Number in Class | 25 | 17 | 75 |
Road Numbers | 334-358 | ||
Gauge | 5'6" | 5'6" | 5'6" |
Number Built | 25 | 17 | 75 |
Builder | Vulcan Foundry | Robert Stephenson & Co | several |
Year | 1907 | 1903 | 1914 |
Valve Gear | Walschaert | Stephenson | Walschaert |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 16 / 4.88 | 16 / 4.88 | 16 / 4.88 |
Engine Wheelbase (ft / m) | 24.17 / 7.37 | 24.17 / 7.37 | 24.17 / 7.37 |
Ratio of driving wheelbase to overall engine wheelbase | 0.66 | 0.66 | 0.66 |
Overall Wheelbase (engine & tender) (ft / m) | 48 / 14.63 | 48 / 14.63 | 48 / 14.63 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,352 / 13,767 | 33,936 / 15,393 | 30,352 / 13,767 |
Weight on Drivers (lbs / kg) | 123,760 / 56,137 | 133,168 / 60,404 | 129,584 / 58,778 |
Engine Weight (lbs / kg) | 139,440 / 63,249 | 150,304 / 68,177 | 149,856 / 67,974 |
Tender Loaded Weight (lbs / kg) | 90,160 / 40,896 | 90,272 / 40,947 | 92,064 / 41,760 |
Total Engine and Tender Weight (lbs / kg) | 229,600 / 104,145 | 240,576 / 109,124 | 241,920 / 109,734 |
Tender Water Capacity (gals / ML) | 4200 / 15.91 | 4200 / 15.91 | 4200 / 15.91 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.60 / 6 | 6.60 / 6 | 6.60 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 | 55 / 27.50 | 54 / 27 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 56 / 1422 | 56 / 1422 | 56 / 1422 |
Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 | 160 / 1100 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 | 21" x 26" / 533x660 | 21.5" x 26" / 546x660 |
Tractive Effort (lbs / kg) | 28,414 / 12888.39 | 31,327 / 14209.71 | 29,188 / 13239.47 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 | 4.25 | 4.44 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 191 - 2.25" / 57 | 303 - 2" / 51 | 102 - 2.25" / 57 |
Flues (number - dia) (in / mm) | 24 - 5.25" / 133 | 24 - 5.25" / 133 | |
Flue/Tube length (ft / m) | 12.87 / 3.92 | 13 / 3.96 | 12.75 / 3.81 |
Firebox Area (sq ft / m2) | 157 / 14.59 | 173 / 16.07 | 156.50 / 14.54 |
Grate Area (sq ft / m2) | 32.14 / 2.99 | 32 / 2.97 | 32 / 2.97 |
Evaporative Heating Surface (sq ft / m2) | 1606 / 149.20 | 2235 / 207.64 | 1348 / 125.23 |
Superheating Surface (sq ft / m2) | 410 / 38.09 | ||
Combined Heating Surface (sq ft / m2) | 1606 / 149.20 | 2235 / 207.64 | 1758 / 163.32 |
Evaporative Heating Surface/Cylinder Volume | 169.88 | 214.43 | 123.39 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 5785 | 5760 | 5120 |
Same as above plus superheater percentage | 5785 | 5760 | 6298 |
Same as above but substitute firebox area for grate area | 28,260 | 31,140 | 30,799 |
Power L1 | 4249 | 4997 | 7956 |
Power MT | 302.76 | 330.90 | 541.42 |