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| Class E926 "East i" | |
|---|---|
 East i series inspection train | |
| Manufacturer | Tokyu Car Corporation |
| Constructed | 2001 |
| Entered service | 2001 |
| Scrapped | 2015 (E926-13) |
| Number built | 7 vehicles |
| Number in service | 6 vehicles (1 set) |
| Number scrapped | 1 vehicle |
| Formation | 6 cars per trainset |
| Fleet numbers | S51[1] |
| Operators | JR East,JR Hokkaido |
| Lines served | Hokuriku Shinkansen, Jōetsu Shinkansen, Tōhoku Shinkansen, Hokkaido Shinkansen, Yamagata Shinkansen, Akita Shinkansen |
| Specifications | |
| Train length | 125.6 m (412 ft) |
| Car length | 20 m (66 ft) or 22.8 m (75 ft) |
| Width | 2.94 m (9.6 ft) |
| Height | 4.29 m (14.1 ft) |
| Maximum speed | 275 km/h (171 mph) (Tōhoku Shinkansen, Jōetsu Shinkansen, Hokuriku Shinkansen, Hokkaido Shinkansen) 130 km/h (80 mph) (Yamagata Shinkansen, Akita Shinkansen) |
| Traction motors | Mitsubishi Electric three-phase induction AC motor MT-205 |
| Acceleration | 1.6 km/(h⋅s) (0.99 mph/s) |
| Electric system(s) | 25 kV 50/60 Hz AC, 20 kV 50 Hz ACoverhead catenary |
| Current collector(s) | Pantograph |
| Bogies | DT207A, TR8012 (E926-3, 13)[2] |
| Braking system(s) | Regenerative braking combined with electric command type air braking |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) |
TheClass E926 (E926形) also known as theEast-i, is a high-speed diagnostic train used onJR East'sShinkansen lines. Entering service in 2001, it is based on theE3 series and carries out line inspections at a maximum speed of 275 km/h (171 mph). It operates on theJōetsu Shinkansen, theTōhoku Shinkansen as well as its twomini-shinkansen branch lines, theYamagata Shinkansen andAkita Shinkansen; the train also operates on theHokkaido Shinkansen, owned byJR Hokkaido, as well as sections of theHokuriku Shinkansen owned byJR West. Similar types of diagnostic trains calledDoctor Yellow operate on theTokaido Shinkansen andSan'yo Shinkansen.
The Class E926 is a non-revenue earning diagnostic train designed to replace the agingClass 925 inspection train. The Class 925, based on the200 series, had a lower top speed than newly-introduced trainsets at the time, such as theE3 series. Its loading gauge was also incompatible with themini-shinkansen, which used narrower trains. At the time, the mini-shinkansen relied on KuMoYa 743 series inspection railcars. In response to these needs, the Class E926 was introduced in 2001, with the Class 925 withdrawn that same year.
The i in East i stands for intelligent, integrated, and inspection.[3] Since the routes and times of operation of the East i train are not publicly disclosed, it is considered lucky by railway enthusiasts when the viewer sees it.[4]
There are 7 East i series inspection train cars that were built. Cars 2 and 4 are equipped with a single armpantograph. Prior to the scrapping of car E926-13 in 2015, when the 6-car train was being maintained, a spare track inspection car was inserted into anE2 series set.[5][6][7]
| Car No. | 1 | 2 | 3 (13) | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Uses | Communication, signal, andcatenary testing car | Communication and power supply testing car | Track inspection car | Catenary inspection car | Power supply and signal detection car | Communication, signal, andcatenary testing car |
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