Assam Railway & Trading Co 2-8-2 Locomotives in India
Class Details by Steve Llanso of Sweat House Media
Class YD (Locobase 20909)
Data from No. 46, "Goods Engine and Tender for the Assam Bengal Railway", Vulcan Foundry Locomotive Catalogue found on Flicker's Historical Locomotive Images website at [
], last accessed 26 June 2021. (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 4399-4402 in 1929.
This was the original version of the IRS series's metre-gauge goods locomotives, which were designed as part of the second standardization effort. Their Belpaire fireboxes held three 3" (76 mm) arch tubes.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | YD |
| Locobase ID | 20909 |
| Railroad | Assam Railway & Trading Co |
| Country | India |
| Whyte | 2-8-2 |
| Number in Class | 4 |
| Road Numbers | 202 |
| Gauge | Metre |
| Number Built | 4 |
| Builder | Vulcan Foundry |
| Year | 1929 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.42 / 4.09 |
| Engine Wheelbase (ft / m) | 27.12 / 8.27 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.13 / 14.37 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 88,480 / 40,134 |
| Engine Weight (lbs / kg) | 122,640 / 55,629 |
| Tender Loaded Weight (lbs / kg) | 57,680 / 26,163 |
| Total Engine and Tender Weight (lbs / kg) | 180,320 / 81,792 |
| Tender Water Capacity (gals / ML) | 2400 / 9.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 19,584 / 8883.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.52 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 75 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | 18 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 15 / 4.57 |
| Firebox Area (sq ft / m2) | 124 / 11.52 |
| Grate Area (sq ft / m2) | 23 / 2.14 |
| Evaporative Heating Surface (sq ft / m2) | 1169 / 108.60 |
| Superheating Surface (sq ft / m2) | 278 / 25.83 |
| Combined Heating Surface (sq ft / m2) | 1447 / 134.43 |
| Evaporative Heating Surface/Cylinder Volume | 209.31 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4140 |
| Same as above plus superheater percentage | 4927 |
| Same as above but substitute firebox area for grate area | 26,561 |
| Power L1 | 11,064 |
| Power MT | 1102.71 |