Indian Railways class XT
India 1929 77 produced
As a part of the IRS program, the class XT was a small tank locomotive for passenger service on broad gauge branch lines. It had two driving axles with wheels of 51 inches or 1,295 mm and a flexible trailing axle that was mounted in Timken roller bearings. Another modern feature was the Caprotti valve gear. The cylinders measured twelve inches in diameter and had a stroke of 22 inches. To make better use of poor coal, a wide firebox was hidden between the water tanks. With full supplies, the maximum axle load was 14 tons. A total of 77 locomotives were built from 1929, at least partially in the Ajmer workshops.
Technical data
General
- Built
- ab 1929
- Manufacturers
- Ajmer
- Wheel arrangement
- 0-4-2T
- Gauge
- 1,676 mm (Indian broad gauge)
Dimensions and weights
- Length
- 9.22 m
- Wheelbase
- 4.52 m
- Empty mass
- 34.2 t
- Service mass
- 42.1 t
- Adhesion mass
- 28.2 t
- Rigid wheelbase
- 1.98 m
- Axle load
- 14.2 t
- Water capacity
- 3,638 l
- Fuel capacity
- 2 t (coal)
Boiler
- Grate area
- 1.301 m²
- Evaporative heating surface
- 53.605 m²
- Superheater surface
- 13.378 m²
- Total heating surface
- 67.0 m²
Power plant
- Driver diameter
- 1,295 mm
- Boiler pressure
- 14.5 bar
- Expansion type
- simple expansion
- Cylinders
- two, 305 x 559 mm
Power
- Power source
- steam
- Estimated power
- 298 kW (405 PS)
- Starting effort
- 49.3 kN
Calculated values
- Factor of adhesion
- 1 : 5.61
- Optimal speed
- 37 km/h
- Power-to-weight ratio
- 7.1 kW/t
- Adhesive weight/Total
- 1 : 1.49
- Tractive force/Heating surface
- 1 : 15.38
- Grate area/Heating surface
- 1 : 51.49
- Total/Superheater
- 1 : 4.01
