| Driving Wheels | 4ft 8ins |
| Weight | 234 tons |
| Boiler Pressure | 210psi Superheated |
| Cylinders | Four Outside – 20½in x 26in |
| Tractive Effort | 69,655 lbf |
| Valve Gear | Walschaerts |
In 1930 Beyer, Peacock and Company in Gorton, Manchester built sixteen class N locomotives for the Bengal-Nagpur Railway.
In 1944 the management of the Bengal Nagpur Railway was taken over by the Government of India. Eight years later the Eastern Railway was formed with the portion of East Indian Railway Company east of Mughalsarai and the Bengal Nagpur Railway. In 1955 the South Eastern Railway was formed which was largely made up of the lines operated by the Bengal Nagpur Railway.
The order for the class N engines followed the success a few years earlier of the two 2-8-0+0-8-2 supplied class HSG locomotives.
At the time of their construction, they had the largest water capacity of any Garratt, in addition to being the largest locomotives in India. Due to their heavy weight the locomotives were restricted to running on 90 lb/yard rails. They were the only 4-8-0+0-8-4 Garratts to run anywhere in the world and at 91ft long with a weight of 235 tons were the biggest locomotives to work in Asia..
The powerful locomotives could haul loads of 3,000 tonnes and 2400 tonnes up a 1 in 100 gradient whilst achieving a speed of 45mph.
Like earlier Garratt locomotives they were used on the Chakradharpur-Jharsuguda and also at Anara-Tatanagar sections. After electrification, they were used at Rourkela.
Thy were last used in 19070/71 hauling heavy iron ore trains between Chhattisgarh’s Dalli- Rajhara and Bhilai.
The class was withdrawn from service early in the 1970s.
Preserved British Steam Locomotives 