Darjeeling Himalaya Beyer-Garratt Locomotives in India
Class Details by Steve Llanso of Sweat House Media
Class D (Locobase 684)
Data from Gavin Hamilton -- [
]; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p.47. See also The Locomotive, Volume XVII [17] (15 April 1911), p. 85. Works number was 5407 in 1910.
The LM report commented that the Garratt layout was "well adapted" to handle the Darjeeling profile. The sharp reverse curves would entail superelevation that often put the two power bogies on different planes. The report added that in addition to the 720 US gallons in the two end tanks, a underframe tank held another 200 US gallons.
According to Gavin Hamilton, this was not an entirely successful ocomotive. Durrant offered several speculations as to why. A key reason could have been some weak elements in the design Other factors could have included lack of sufficient traffic requiiring tis use as well as short sidings and weak couplers. Nevertheless, it operated on the DHR until 1953.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | D |
| Locobase ID | 684 |
| Railroad | Darjeeling Himalaya |
| Country | India |
| Whyte | 0-4-0+0-4-0 |
| Number in Class | 1 |
| Road Numbers | 31 |
| Gauge | 2' |
| Number Built | 1 |
| Builder | Beyer, Peacock |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.50 / 2.59 |
| Engine Wheelbase (ft / m) | 24.50 / 7.47 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 24.50 / 7.47 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 16,576 / 7519 |
| Weight on Drivers (lbs / kg) | 62,804 / 28,487 |
| Engine Weight (lbs / kg) | 62,804 / 28,487 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 62,804 / 28,487 |
| Tender Water Capacity (gals / ML) | 1020 / 3.86 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 26 / 13 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 26 / 660 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 14" / 279x356 (4) |
| Tractive Effort (lbs / kg) | 17,722 / 8038.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.54 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 195 - 1.625" / 41 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.25 / 2.21 |
| Firebox Area (sq ft / m2) | 64 / 5.95 |
| Grate Area (sq ft / m2) | 17.50 / 1.63 |
| Evaporative Heating Surface (sq ft / m2) | 667 / 61.97 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 667 / 61.97 |
| Evaporative Heating Surface/Cylinder Volume | 216.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2800 |
| Same as above plus superheater percentage | 2800 |
| Same as above but substitute firebox area for grate area | 10,240 |
| Power L1 | 2222 |
| Power MT | 312.00 |