DSB Class MY
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| Type and origin | |
|---|---|
| Power type | Diesel-electric |
| Builder | Nydqvist & Holm AB |
| Build date | 1954–58, 1964–65 |
| Total produced | 59 |
| Specifications | |
|---|---|
| UIC class | (A1A)'(A1A)' |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Wheel diameter | 1,016 mm (40 in) |
| Minimum curve | 90 m (300 ft) |
| Length | 18.90 m (62 ft 1⁄8 in) |
| Width | 3.00 m (9 ft 10 1⁄8 in) |
| Height | 4.295 m (14 ft 1 1⁄8 in) |
| Axle load | 18 t (18 long tons; 20 short tons) |
| Loco weight | 101.60 t (100.00 long tons; 111.99 short tons) |
| Fuel capacity | 3,400 L (750 imp gal; 900 US gal) |
| Lubricant cap | 760 L (170 imp gal; 200 US gal) |
| Sandbox cap | 300 L (66 imp gal; 79 US gal) |
| Prime mover |
EMD 567B EMD 567C EMD 567 D1 (EMD 645E) |
| RPM range | 275–800 rpm (567B) 275–835 rpm (567C, 567D1) 315–905 rpm (645E, mod. 567) |
| Engine type | V16 two-stroke diesel |
| Aspiration | Roots blower |
| Cylinders | 16 |
| Cylinder size | 8.5 in × 10 in (216 mm × 254 mm) |
| Transmission | Electric |
| Safety systems | ATC (from 1995) |
| Performance figures | |
|---|---|
| Maximum speed | 133 km/h (83 mph) |
| Power output | 1,700 hp (1,300 kW); 1,950 hp (1,450 kW) |
| Tractive effort | 235 kN (53,000 lbf) |
| Career | |
|---|---|
| Locale | Denmark |
| Disposition | majority scrapped, several preserved |
The class MY is a class of diesel-electric locomotives built in the years 1954–65 by NOHAB. A total of 59 units, numbered 1101–1159, were delivered to the Danish State Railways. Powered by GM-EMD engines, the locomotives represented a significant change in rolling stock policy — motive power had largely been sourced from within Denmark for several decades.
In the early 50s the DSB was starting to look for a new type of motive power that could replace steam locomotives in Denmark.
MY 1101 was built by NOHAB alone, but all subsequent units had bodies, underbodies and bogies built at Danish manufacturer Frichs in order to limit foreign currency spending. For the same reason, and because of pressure from Danish industry, the electrical systems of MY 1105 and later were sub-supplied by Danish companies Thrige and Titan.
The DSB ordered the first four units which arrived at Helsingør in 1954. The locomotives quickly became very popular among both passengers and crew.
To replace steam on branch lines, a similar but lighter locomotive, the class MX, was developed, incorporating a 12-cylinder 567 engine.
In their early years the locomotives hauled express trains (later known as InterCity) and heavy freight services, but in their later years they were transferred to smaller regional and light freight services.
In the 1980s and 90s the DSB began to have less and less need for them, and the last ordinary MY-hauled train ran in 2001. One unit however, 1135, is now a special service locomotive which runs special trains, so DSB still has MY locos in service. The others have either been scrapped or sold to diverse private operators in Norway, Germany and Sweden, who now use them on light freight duties. They are called TMY in Sweden (as diesel locomotives have names beginning with T in Sweden).
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Wikipedia