Burma Railways classes K and Ks
Burma 1905 109 produced
Starting in 1904, Burma Railways received two classes of 4-6-0 locomotives with BESA standard boilers. While class J was built for mixed traffic, class K shown here was intended only for goods traffic. Up to 1914, a total of 75 class K locomotives were built by Nasmyth Wilson, North British and Stephenson. In World War I, 13 were sent to Mesopotamia and never returned to Burma.
From 1920, 34 superheated Ks have been built, of which seven were built in Germany by Rheinmetall. Also many locomotives of the original class K were superheated. With a total of 109, they were the second most numerous class of Burmese steam locomotives after class F. After World War II, around 30 were still in service.
Technical data
General
| Property | K | Ks |
|---|---|---|
| Built | 1905-1914 | 1920-1925 |
| Manufacturers | Nasmyth, Wilson & Co., North British, Robert Stephenson & Co. | Nasmyth, Wilson & Co., North British, Rheinmetall |
| Wheel arrangement | 4-6-0 (Ten-wheeler) | |
| Gauge | 1,000 mm (Meter gauge) | |
Dimensions and weights
| Property | K | Ks |
|---|---|---|
| Length | 16.06 m | |
| Wheelbase | 6.43 m | |
| Total wheelbase | 13.15 m | |
| Empty mass | 31.4 t | |
| Service mass | 36.1 t | |
| Adhesion mass | 27.4 t | |
| Total mass | 62.3 t | 62.2 t |
| Rigid wheelbase | 3.66 m | |
| Axle load | 9.1 t | |
| Water capacity | 8,411 l | |
| Fuel capacity | 7.1 t (coal) | 0.7 t (coal) |
Boiler
| Property | K | Ks |
|---|---|---|
| Grate area | 1.424 m² | |
| Firebox surface | 10.034 m² | |
| Tube heating surface | 88.072 m² | 62.803 m² |
| Evaporative heating surface | 98.106 m² | 72.836 m² |
| Total heating surface | 98.1 m² | 83.1 m² |
| Superheater surface | 10.312 m² | |
Power plant
| Property | K | Ks |
|---|---|---|
| Driver diameter | 1,219 mm | |
| Boiler pressure | 12.4 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 381 x 559 mm | |
Power
| Property | K | Ks |
|---|---|---|
| Power source | steam | |
| Estimated power | 410 kW (557 PS) | |
| Starting effort | 70.2 kN | |
Calculated values
| Property | K | Ks |
|---|---|---|
| Factor of adhesion | 1 : 3.83 | |
| Optimal speed | 35 km/h | |
| Power-to-weight ratio | 11.4 kW/t | |
| Heating Surface Equivalent | 148.3 m² | 143.6 m² |
| Cylinder volume/HSE | 1 : 859.32 | 1 : 887.11 |
| Adhesive weight/Total | 1 : 1.31 | |
| Tractive force/Heating surface | 1 : 14.94 | 1 : 17.63 |
| Grate area/Heating surface | 1 : 68.89 | 1 : 58.39 |
| Firebox/Tube surface | 1 : 8.78 | 1 : 6.26 |
| Total/Superheater | 1 : 7.06 | |
