BNR class P

Specifications
Specifications
Configuration:;
• Whyte	4-8-2+2-8-4 Garratt
• UIC	(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:
• Grate 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)

Type and origin
Type and origin
Power type	Steam
Builder	Beyer, Peacock & Company
Serial number	6931–6934
Build date	1939
Total produced	4

BNR Class P
BNR Class P
Power type
Type and origin
Power type	Steam
Builder	Beyer, Peacock & Company
Serial number	6931–6934
Build date	1939
Total produced	4
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-2+2-8-4 Garratt
• UIC	(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:
• Grate 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)
Tractive effort
Performance figures
Tractive effort	69,655 lbf (309.84 kN)
Operators
Career
Operators	Bengal Nagpur Railway; →Indian Railways;
Numbers	BNR: 855–858; →IR: 38855–38858;
Locale	East Central Railway zone
First run	1939
Disposition	Scrapped

Power typeSteam

BuilderBeyer, Peacock & Company

Serial number6931–6934

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]

[1]

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

BNR class P

References

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