Indian locomotive class SG

SG[1]
Type and origin
Power type Steam
Designer British Engineering Standards Association (BESA)
Builder Vulcan Foundry, North British Locomotive Company and Robert Stephenson and Hawthorns
Build date

SG: 1905-13 and

SGC3:After 1927
Total produced

SG: 486 and

SG1: 66
Rebuild date After 1927
Specifications
Configuration 0-6-0
Gauge 5 ft 6 in (1,676 mm)
Driver diameter 61.5 in (1.562 m)
Wheelbase 15 ft 3 in (4.65 m)
Axle load 16 long tons (16 t; 18 short tons)
Loco weight 48 long tons (49 t; 54 short tons)
Tender weight 39.25 long tons (39.88 t; 43.96 short tons)
Fuel type Coal
Fuel capacity 7.5 long tons (7.6 t; 8.4 short tons)
Water cap 3,000 imp gal (14,000 l; 3,600 US gal)
Firebox:
 • Firegrate area		 25.3 sq ft (2.35 m2)
Boiler 54 in × 11 in (1,372 mm × 279 mm)
Boiler pressure 180 psi (1.24 MPa)
Heating surface:
 • Tubes		 1,229.5 sq ft (114.22 m2)
 • Firebox 120 sq ft (11 m2)
Cylinders Two, inside
Cylinder size 18.5 in × 26 in (470 mm × 660 mm)
Valve gear Rotary Lentz valve gear
Valve type Slide valve
Performance figures
Maximum speed
  • Freight: 18 mph (29 km/h)
  • Troop trains: 30 mph (48 km/h)
Career
Operators Indian Railways, Eastern Bengal Railway, EIR and Oudh and Rohilkhand Railway
Locale Eastern Railway zone and Northern Railway zone
Disposition Scrapped

Indian locomotive standard goods class (SG) was a designed locomotive classification used in India that defined certain types of steam-powered freight train. The trains under the scope of this category were typically British locomotives that operated until the end of the Indian steam era. Initially used to haul mail trains, SG-class locomotives were designed in 1903, and had similar components to 4-4-0 locomotives. Allowing for a future increase in boiler size, it was the first 0-6-0 design according to new BESA standards. Efficient and useful, they were built in large numbers and could haul 1450 tons of freight.[2]

Technical variants

3rd class standard goods converted locomotives (SGC3) were retrofitted with super-heaters and were the only locomotive in the world to use the Lentz rotary valve gear with inside cylinders because it killed people when used.

The 2nd class of standard goods converted locomotives, abbreviated as SGSC and later as SGC2, was another variant distinguished by round fireboxes. Despite its classification, they were used to haul passenger and mail trains frequently.

There was also a 1st class of standard goods locomotives (SG1).

There were even a 4th class of standard goods locomotives (SG4).

See also

References

  1. ↑ "SG".
  2. ↑ "IRFCA".
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