NSB Class 66

NSB Class 66
NSB 66.02 at Skien Station in 1973
In service	1945–1977
Manufacturer	Skabo
Constructed	1945–1946
Number built	4 units
Formation	BFM + B + BS
Capacity	170 (46+70+54)
Operator(s)	Norwegian State Railways
Line(s) served	Østfold Line Sørlandet Line Vestfold Line
Specifications
Car length	Motor car: 22,175 mm (72 ft 9 in) Center car: 21,750 mm (71 ft 4 in) Control car: 21,750 mm (71 ft 4 in)
Maximum speed	120 km/h (75 mph)
Weight	Motor car: 46.7 t (46.0 long tons; 51.5 short tons) Center car: 28.0 t (27.6 long tons; 30.9 short tons) Control car: 28.5 t (28.0 long tons; 31.4 short tons)
Power output	474 kW (636 hp)
Electric system(s)	15 kV  16 2⁄3 Hz AC Catenary
Current collection method	Pantograph
Track gauge	1,435 mm (4 ft 8 1⁄2 in)

NSB Class 66 (Norwegian: NSB type 66) was a three-car electric train used by the Norwegian State Railways for express trains on the Østfold Line to Halden and Gothenburg, and the Sørlandet Line to Kristiansand and Stavanger. The four multiple units were built by Skabo Jernbanevognfabrikk, with motors from Norsk Elektrisk & Brown Boveri, and delivered in 1945–46. They were originally named Class 106, but this was changed in 1956. The trains received the numbering BFM 66.01–04, B 66.31–34 and BS 66.61–64.

The class was the electric counterpart of diesel Class 88. With a power output of 474 kW (636 hp), it was the first train capable of 120 kilometers per hour (75 mph) in Norway. One of the Class 66 trains was involved in the Hjuksebø train disaster in 1950. Since 1967, the trains served on the Vestfold Line. The Class 66 was retired from service in 1977. BFM 66.01 has been preserved by the Norwegian Railway Museum.

Four Class 66 units were ordered by the Norwegian State Railways (NSB) in 1939, to be used as express trains on the then newly or shortly-to-be electrified Sørland- and Østfold Lines. At the same time, similar Class 88 diesel multiple units were ordered for the non-electrified Bergen- and Dovre Lines. The trains were built by Strømmens Værksted, Skabo Jernbanevognfabrikk and Norsk Elektrisk & Brown Boveri (NEBB). The diesel series was assembled by Strømmen, while Skabo assembled the electric version. NEBB delivered the motors for the units.