BNR class P

BNR Class P
Type and origin
Power type Steam
Builder Beyer, Peacock and Company
Serial number 6931–6934
Build date 1939
Total produced 4
Specifications
Configuration 4-8-2+2-8-4 Garratt
UIC class (2′D1′)(2′D1′) h4t
Gauge 5 ft 6 in (1,676 mm)
Driver dia. 4 ft 8 in (1.422 m)
Axle load 17 long tons (17 t)
Loco weight 230 long tons (230 t)
Fuel type Coal
Fuel capacity 10 long tons (10 t)
Water cap 7,500 imp gal (34,000 l; 9,000 US gal)
Firebox:
 • Firegrate area		 70 sq ft (6.5 m2)
Boiler pressure 210 psi (1.45 MPa)
Superheater:
 ​
 • Heating area 661 sq ft (61.4 m2)
Cylinders Four, outside
Cylinder size 20 1⁄2 in × 26 in (521 mm × 660 mm)
Performance figures
Tractive effort 69,655 lbf (309.84 kN)
Career
Operators
Numbers
  • BNR: 855–858
  • →IR: 38855–38858
Locale East Central Railway zone
First run 1939
Disposition Scrapped

The Bengal Nagpur Railway class P was a class of four 4-8-2+2-8-4 (“Double Mountain”) Garratt locomotives. It was developed from BNR class N and BNR class NM. The Anuppur-Chirmiri section had a severe curvature and it needed an engine with a trailing bogie. Its boiler was slightly enlarged similar to the NM. Due to its water and coal capacity being less than that of N, it could run on 75 lb/yard rails. It could haul 1,500 long tons (1,500 t) load up a 1 in 91 gradient.[1]

Technical specifications

Boiler diameter 7 ft 1 13⁄16 in (2.180 m)
Heating area in firebox 330 sq ft (31 m2)
Boiler area 3,120 sq ft (290 m2)
Adhesive weight 136 tonnes
Maximum train load 3165 tonnes on level track

Sheds holding Class P Garratt

See also

References

  1. ↑ "5Brinkster". Archived from the original on 2013-10-23.
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