BNR Class P
Type and origin
Power typeSteam
BuilderBeyer, Peacock & Company
Serial number6931–6934
Build date1939
Total produced4
Specifications
Configuration:
​
 • Whyte4-8-2+2-8-4 Garratt
 • UIC(2′D1′)(2′D1′) h4t
Gauge5 ft 6 in (1,676 mm)
Driver dia.4 ft 8 in (1.422 m)
Axle load17 long tons (17 t)
Loco weight230 long tons (230 t)
Fuel typeCoal
Fuel capacity10 long tons (10 t)
Water cap.7,500 imp gal (34,000 L; 9,000 US gal)
Firebox:​
 • Grate area70 sq ft (6.5 m2)
Boiler pressure210 psi (1.45 MPa)
Superheater:
​
 • Heating area661 sq ft (61.4 m2)
CylindersFour, outside
Cylinder size20+1⁄2 in × 26 in (521 mm × 660 mm)
Performance figures
Tractive effort69,655 lbf (309.84 kN)
Career
Operators
Numbers
  • BNR: 855–858
  • →IR: 38855–38858
LocaleEast Central Railway zone
First run1939
DispositionScrapped

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 severe curves and it needed an engine with a trailing bogie. Its boiler was slightly enlarged similar to the NM.

It could haul 1,500 long tons (1,500 t) load up a 1 in 91 gradient.[1]

Technical specifications

Boiler diameter7 ft 1+13⁄16 in (2.180 m)
Heating area in firebox330 sq ft (31 m2)
Boiler area3,120 sq ft (290 m2)
Adhesive weight136 tonnes
Maximum train load3165 tonnes on level track

References

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