Indian locomotive class NDM-1

NDM1 & ZDM1
NDM1a No. 500 at the head of a train departing to Matheran at Neral station.
Type and origin
Power type	Diesel-hydraulic
Builder	Arnold Jung Lokomotivfabrik
Serial number	12104–12111
Build date	1955
Total produced	7
Specifications
UIC classification	B+B
Gauge	ZDM: 2 feet 6 inches (762 mm) NDM: 2 feet 0 inches (610 mm)
Minimum curve	15 m (49.2 ft) radius
Locomotive weight	29 tonnes (29 long tons; 32 short tons)
Prime mover	MWM TRHS 518S of 145/128 hp, 2 off
Transmission	Twin Voith hydraulic
Performance figures
Maximum speed	33 km/h (21 mph)
Power output	290 hp (216 kW)
Tractive effort	Starting: 86.2 kN (19,400 lbf)
Career
Operator(s)	Indian Railways
Number(s)	500–505, 704
Locale	Matheran Hill Railway Pragati Maidan

NDM-1 is a class of narrow gauge diesel locomotives built for Indian Railways in 1955. They are B+B diesel hydraulic locomotives.

Each locomotive consists of three sections, two identical four-wheeled bogies that are coupled together, with a cab suspended between the two. The only difference between the NDM1 class and the ZDM1 is the gauge. NDM1s are 2-foot (610 mm) gauge, the ZDM1s are 2-foot-6-inch (762 mm) gauge. Conversion between gauges (and thus classes) is possible and has been carried out on three locomotives.

When new, three (Jung 12109–12111), were built as 2-foot gauge NDM1s for the Matheran Hill Railway and numbered 501–503. The other four (Jung 12104–12108) were 2-foot-6-inch gauge ZDM1s built for the Kalka–Shimla Railway and numbered 700–704. Number 700 was rebuilt to 2-foot gauge in 1976 and renumbered 500 and transferred to the Matheran Hill Railway. Three others followed later with 701–703 becoming 504, 506 and 505. The last ZDM1, 704, was moved to the Pragati Maidan exhibition centre.^[1]

References

Notes

↑ Hughes 1996, p. 72

Bibliography

Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN 0-9521655-1-1.
Indian narrow gauge diesel loco information