Cordoba Central Railway class L2a
later rebuilt to class B15
Argentina 1926 15 produced
In 1926, the Cordoba Central Railway in Argentina received 15 4-6-4T tank locomotives from the North British Locomotive Company. They had been designed by the railway's chief mechanical engineer Lightly Simpson and were used for mixed traffic. Being meter-gauge and having driving wheels of 4 ft 6 in and a great length, they looked very sleek. With a rigid wheelbase of only ten feet at a total wheelbase of 33 ft 7 in, they most likely had good running characteristics in tight curves. In 1939, the whole railway became part of the Argentine State Railway. In 1942 and 1943, they were rebuilt to 4-6-2 tender locomotives in the railway's Alta Cordoba shops to increase their supplies.
Technical data
General
| Property | as built | rebuilt B15 |
|---|---|---|
| Built | 1926 | 1942-1943 |
| Manufacturers | North British | Alta Cordoba |
| Wheel arrangement | 4-6-4T (Hudson) | 4-6-2 (Pacific) |
| Gauge | 1,000 mm (Meter gauge) | |
Dimensions and weights
| Property | as built | rebuilt B15 |
|---|---|---|
| Wheelbase | 10.24 m | |
| Service mass | 89.1 t | |
| Adhesion mass | 46.6 t | 49.9 t |
| Rigid wheelbase | 3.05 m | |
| Water capacity | 11,364 l | 23,364 l |
| Fuel capacity | 3 t (coal) | 7.1 t (coal) |
Boiler
| Property | as built | rebuilt B15 |
|---|---|---|
| Grate area | 2.378 m² | |
| Firebox surface | 10.405 m² | |
| Tube heating surface | 128.392 m² | |
| Evaporative heating surface | 138.797 m² | |
| Superheater surface | 24.898 m² | |
| Total heating surface | 163.7 m² | |
Power plant
| Property | as built | rebuilt B15 |
|---|---|---|
| Driver diameter | 1,372 mm | |
| Boiler pressure | 11 bar | 15.2 bar |
| Expansion type | simple expansion | |
| Cylinders | two, 508 x 610 mm | two, 470 x 610 mm |
Power
| Property | as built | rebuilt B15 |
|---|---|---|
| Power source | steam | |
| Estimated power | 783 kW (1,065 PS) | 932 kW (1,267 PS) |
| Starting effort | 107.5 kN | 126.5 kN |
Calculated values
| Property | as built | rebuilt B15 |
|---|---|---|
| Factor of adhesion | 1 : 4.25 | 1 : 3.87 |
| Optimal speed | 45 km/h | |
| Power-to-weight ratio | 8.8 kW/t | |
| Heating Surface Equivalent | 240.6 m² | |
| Cylinder volume/HSE | 1 : 1,026.99 | 1 : 878.71 |
| Adhesive weight/Total | 1 : 1.91 | |
| Tractive force/Heating surface | 1 : 13.72 | 1 : 16.14 |
| Grate area/Heating surface | 1 : 68.84 | |
| Firebox/Tube surface | 1 : 12.34 | |
| Total/Superheater | 1 : 5.57 | |