BNR Class P |
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Specifications |
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Configuration:
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• Whyte |
4-8-2+2-8-4 Garratt |
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• UIC |
(2′D1′)(2′D1′) h4t |
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Gauge |
5 ft 6 in (1,676 mm) |
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Driver dia. |
4 ft 8 in (1.422 m) |
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Axle load |
17 long tons (17 t) |
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Loco weight |
230 long tons (230 t) |
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Fuel type |
Coal |
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Fuel capacity |
10 long tons (10 t) |
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Water cap |
7,500 imp gal (34,000 l; 9,000 US gal) |
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Firebox: • Firegrate area |
70 sq ft (6.5 m2) |
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Boiler pressure |
210 psi (1.45 MPa) |
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Superheater:
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• Heating area |
661 sq ft (61.4 m2) |
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Cylinders |
Four, outside |
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Cylinder size |
20 1⁄2 in × 26 in (521 mm × 660 mm) |
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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