BNR class N

BNR class N

Preserved unit at National Rail Museum, Delhi
Type and origin
Power type Steam
Builder Beyer, Peacock & Co.
Serial number 6583–6598
Build date 1929
Total produced 16
Specifications
Configuration 4-8-0+0-8-4
UIC classification (2′D)(D2′) h4t
Gauge 5 ft 6 in (1,676 mm)
Driver diameter 4 ft 8 in (1.422 m)
Axle load 20.25 long tons (20.57 t)
Weight on drivers 159.4 long tons (162.0 t)
Locomotive weight 234 long tons (238 t)
Fuel type Coal
Fuel capacity 14 long tons (14 t)
Water capacity 10,000 imp gal (45,000 l; 12,000 US gal)
Boiler pressure 210 psi (1.45 MPa)
Firegrate area 69.8 sq ft (6.48 m2)
Superheater area 642 sq ft (59.6 m2)
Cylinders Four, outside
Cylinder size 20 1⁄2 in × 26 in (521 mm × 660 mm)
Valve gear Rotary cam poppet and Caprotti
Valve type Piston valves
Performance figures
Maximum speed 45 mph (72 km/h)
Tractive effort 69,655 lbf (309.84 kN)
Career
Operator(s)
Number(s)
  • BNR: 810–825
  • →IR: 38810–38825
Locale South Eastern Railway zone
First run 1929
Last run 1970
Retired 1970
Withdrawn 1970
Preserved No. 811 and 815
Current owner National Rail Museum, Delhi and Kharagpur Workshops
Disposition Withdrawn

The Bengal Nagpur Railway class N Garratt were the ones having largest water capacity of any Garratt. The largest locomotives in India. With the success of HSG, this class followed. Due to their heavy weight, they were restricted to 90 lb/yard rails. They had straight-ported cylinders. It is not known if this suited them for hauling slow, heavy coal traffic. Like HSG, they were used Chakradharpur-Jharsuguda and also at Anara-Tatanagar sections. After electrification, they were used at Rourkela. They could haul 2400 tonnes on a 1 in 100 gradient.[1]

Technical specifications

Boiler diameter 7 ft 1 13⁄16 in (2.18 m)
Boiler area 3,112 sq ft (289.1 m2)
Max Train load 3,000 long tons (3,000 t)

See also

References

  1. ↑ "5Brinkster".