"300X" was the name given to the Class 955 (955形) 6-car experimental Shinkansen train developed in 1994 by the Central Japan Railway Company (JR Central) in Japan to test technology to be incorporated in future shinkansen trains operating at speeds of 300 km/h (190 mph) or higher.
|Class 955 "300X"|
Preserved car 955-6 at Hamamatsu Works, July 2010
|Manufacturer||Hitachi, Kawasaki Heavy Industries, Mitsubishi Heavy Industries, Nippon Sharyo|
|Number built||6 vehicles|
|Number in service||None|
|Number preserved||2 vehicles|
|Number scrapped||4 vehicles|
|Line(s) served||Tōkaidō Shinkansen|
|Car body construction||Aluminium alloy|
|Car length||27,150 mm (89 ft 1 in) |
(end cars), 25,000 mm (82 ft 0 in)
|Width||3,100 mm (10 ft 2 in)|
|Height||3,300 mm (10 ft 10 in)|
|Maximum speed||350 km/h (220 mph) (nominal)|
|Traction system||500 kW (670 hp) motors |
(4 per car)
|Power output||12 MW (16,000 hp)|
|Electric system(s)||25 kV AC, 60 Hz|
|Current collection method||Overhead catenary|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge|
Manufacture of the train was shared among four different manufacturers, with a number of different body construction methods used. The two ends cars employed differing nose designs, and a number of pantograph shroud designs were tested over the lifetime of the trainset.
Cars 2 and 5 were fitted with pantographs.
The body was constructed by Nippon Sharyo using large hollow aluminium extrusions. This was the only car in the trainset to be fitted with passenger seats.
This vehicle was constructed by Kawasaki Heavy Industries using spot-welded large aluminium extrusions, and was fitted with active tilting.
This vehicle was constructed by Hitachi using aluminium honeycomb panels. This car had no seats.
Test-running on the Tōkaidō Shinkansen was delayed by track damage caused by the Great Hanshin earthquake in January 1995, but full-scale test-running commenced on 25 May 1995, between Maibara and Kyoto.
On 11 July 1996, the train recorded a maximum speed of 426.6 km/h (265.1 mph), exceeding the previous national speed record of 425.0 km/h (264.1 mph) set in December 1993 by JR East's Class 952/953 "STAR21" experimental train.
End car 955-1 is preserved outdoors at the RTRI large-scale wind tunnel test facility in Maibara, Shiga. End car 955-6 was initially preserved inside JR Central's Hamamatsu Works, and was moved to the new SCMaglev and Railway Park in 2010.
|Wikimedia Commons has media related to Class 955 "300X".|
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