JNR Class EF66
EF66 11
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| Type and origin | |
|---|---|
| Builder | Kawasaki Sharyō |
| Total produced | 89 |
| Specifications | |
|---|---|
| UIC class | Bo-Bo-Bo |
| Gauge | 1,067 mm (3 ft 6 in) |
| Bogies | DT133A (outer), DT134A (centre) |
| Wheel diameter | 1,120 mm (44 in) |
| Length | 18,200 mm (59 ft 9 in) |
| Width | 2,800 mm (9 ft 2 in) |
| Height | 4,200 mm (13 ft 9 in) |
| Loco weight | 100.8 tonnes |
| Electric system(s) | 1,500 V DC |
| Traction motors | DC motors (MT56) (x6) |
| Transmission | Single-stage reduction gear (20:71), flexible quill drive |
| Performance figures | |
|---|---|
| Maximum speed | 110 km/h (70 mph) |
| Power output | 3.9 MW |
| Tractive effort | 192 kN |
| Career | |
|---|---|
| Operators | |
| Number in class | 39 (as of 1 April 2016[update]) |
| Delivered | 1966 |
| Disposition | In service |
The Class EF66 (EF66形?) is a 6-axle, 3-bogied (Bo-Bo-Bo) DC electric locomotive designed for fast freight used by Japanese National Railways (JNR) and later operated by its descendents JR West and JR Freight. As of 1 April 2016[update], 39 locomotives remained in service, all operated by JR Freight.
Originally these locomotives were designed for express freight on the Tokaido Main Line and Sanyo Main Line, in an attempt to counter the increasing market share being gained by road transport, by providing a fast alternative to road transport using wagons suitable for containerised freight.
The prototype (initially numbered EF90 1, later becoming EF66 901) was built by in 1966; at the time with a power of 3.9 MW it was the world's most powerful narrow-gauge locomotive. The EF66 901 locomotive was retired from front-line service in 1996 and since 2001 is stored at Hiroshima Depot.
The production series of locomotives were delivered from 1968, with 55 built between 1968 and 1974.
Due to increased demand, JR Freight began building more EF66s in 1989 - this second batch of locomotives was classified EF66-100, with locomotive numbered EF66-101 to EF66-133.
The locomotives were designed to be able to haul a 1,000-tonne train at 100 km/h. Each motor has a 650 kW power output, (about 50% more powerful than the EF65). The bogies have an air suspension system to limit the impulsive forces on the track.
Of the first series of production the last 35 (i.e. 21st to 55th locomotive) were slightly different in design, externally a few changes were made - most noticeably above the drivers window a slight 'ledge' is added. Internally, these locomotives had their auxiliary electrical supply uprated from 5 kW to 90 kW.
The second series of locomotives (EF66-100) are fundamentally the same design as the first, but with slightly more modern external styling. The driver's cabs are air-conditioned.
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Wikipedia