Data from plans illustrating a saddle-tank reproduced in Indian Engineering, Volume 31 (26 June 1902), following page 412. See also R N Hodges "Military Light Railway", (17 May 1901), pp. 316-317. Works number 1625 in 1900. (Information on builder and works number from Geoff Coward's Steam Survivors:India database, reproduced on the Indian Railways Fan Club ([]) website, last accessed 15 August 2017.
Hodges, Engineer-in-Chief for the Khushalgarh-Kohat-Thai Miltary Light Railway reported in detail on trials with draft animals and the little locomotive shown in these specs on a Decauville-type rail system. The 1,930 ft (588 metre) section consisted of segments of 21 lb/yard (10.5 kg/metre) rail laid on three steel sleepers, each of these weighing 27 1/2 lb (12.47 kg).
Horses, mules, bullocks, and the four-coupled locomotive tried their power in November 1901 at the NorthWestern Railway's Rawalpindi shops in what is now Pakistan.
Animal Number Could haul couldn't haul
Horse 1 2 1/2 4 1/2
2 4 6
Mule 1 2 3 1/2
2 3 1/2 4 1/2
Bullocks 2 3 1/2 4
"country"
Bullocks 2 2 1/2 3 1/2
It's not clear whether the engine in the trials is the one from the plans -- the tables on page 317 suggest a lighter locomotive.
The KKT opened in 1902--only the 100-km (62-mile) Kohat-Thai section used the 762 mm gauge. The K-T's construction took about two years before it opened in April 1903. A ropeway ferry accident at the Indus River crossing closed that bridge. When it was replaced, the rail line was converted to Indian broad gauge.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | N119 |
| Locobase ID | 20259 |
| Railroad | Khushalgarh-Kohat-Thai MLR |
| Country | India |
| Whyte | 2-4-2ST |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 2'6" |
| Number Built | 1 |
| Builder | WG Bagnall |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4 / 1.22 |
| Engine Wheelbase (ft / m) | 13 / 3.96 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.31 |
| Overall Wheelbase (engine & tender) (ft / m) | 13 / 3.96 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 8792 / 3988 |
| Weight on Drivers (lbs / kg) | 16,632 / 7544 |
| Engine Weight (lbs / kg) | 27,664 / 12,548 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 500 / 1.89 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 14 / 7 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 27 / 686 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8" x 12" / 203x305 |
| Tractive Effort (lbs / kg) | 3627 / 1645.18 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.59 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 26 / 2.42 |
| Grate Area (sq ft / m2) | 5.60 / 0.52 |
| Evaporative Heating Surface (sq ft / m2) | 222 / 20.62 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 222 / 20.62 |
| Evaporative Heating Surface/Cylinder Volume | 317.99 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 840 |
| Same as above plus superheater percentage | 840 |
| Same as above but substitute firebox area for grate area | 3900 |
| Power L1 | 3403 |
| Power MT | 902.16 |
