Shinkansen class 952

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STAR21 (Shinkansen series 952/953)
Control car and intermediate car of the half-train of the Shinkansen series 953 on display in the Sendai depot.
Control car and intermediate car of the half-train of the Shinkansen series 953 on display in the Sendai depot .
Number: Class 952: 4 cars.
Class 953: 5 cars
Manufacturer: Cars 1 to 3: Nippon Sharyo
Cars 4 and 5: Hitachi
Cars 6 to 9: Kawasaki
Year of construction (s): 1991-1992
Retirement: 1998
Gauge : 1435 mm ( standard gauge )
Length: 140 m
Height: 3,500 mm
Width: 3,100 mm
Empty mass: 256 t
Wheel set mass : 10.5 t
Top speed: 425 km / h on test drives
Hourly traction: 3960 kW on delivery, later increased
Acceleration: 0.44 m / s²
Power system : 25 kV 50 Hz ~
Power transmission: Overhead line
Number of traction motors: 12 upon delivery,
later increased
Seats: 471 (437 Standard Class, 34 Green Class)
Classes : normal (2nd class), Green Class (1st class)

The Shinkansen class 952/953 ( Japanese 新 幹線 952 形 ・ 953 形 電車 ) was a nine-part test train set operated by JR East , which was known by the acronym STAR 21 . The acronym formed from S uperior T rain for the A dvanced R ailway toward the 21 st century (German: "High-quality train for advanced railway on the way into the 21st century") was formed. The train consisted of two different half-trains, each with its own series designation. The half-train of the 952 series consisted of four cars with conventionally arranged bogies, the half-train of the 953 series consisted of five cars carried by Jakobs bogies . During test runs, the train reached a top speed of 425 km / h.

history

At the beginning of the 1990s the three railway companies JR East , JR Central and JR West each built a test train to test the technology for commercial operation at speeds of 350 km / h or higher. The focus was on the topics of noise, tunnel bangs , pressure waves in the tunnel during encounters and ground vibrations. These trains also set new speed records : the JR West WIN350 reached 350.4 km / h in August 1992, the JR East STAR21 reached 425 km / h in December 1993 and the JR Central 300X reached 433 km / h in July 1996 The last record was only set in April 2007 by the TGV V150 .

The STAR 21 was the test train of the JR East, which was delivered to the railway company in March 1992 and was officially presented to the press on April 2, 1992. Then the train was used for test runs on the Jōetsu line , where the newly developed bogies and car bodies were examined for their suitability for commercial operation at the higher speed.

The train reached the top speed of 353 km / h on October 30, 1992 between Urasa and Niigata , thus breaking the Japanese speed record set by the WIN350 in August of the same year. On November 1, 1992, the train between Tsubame-Sanjō and Niigata reached 358 km / h.

In 1993 the performance of the train was increased by equipping all axles with traction motors. Further record runs followed in the same year: on December 13th the train reached 400 km / h for the first time, on December 21st it set the record of 425 km / h - also between Tsubame-Sanjō and Niigata. This record was only broken by the 300X in July 1996.

The test train was officially retired in 1998.

Whereabouts

Bogie type DT9035B from Sumitomo , which was tested under the STAR 21.

The end car of the 952 series is set up together with one end car each of the 300X and WIN350 in the wind tunnel of the Railway Technical Research Institute near Maibara . Cars 5 and 9 of the train, which belong to the class 953, are on display in the Shinkansen depot Sendai . Sumitomo donated a bogie from the train to Nara National College of Technology , which is on display there. World icon World iconWorld icon

technical features

Train formation

The train consisted of cars 1 to 4 with conventional bogies, which were designated as the 952 series, and cars 5 to 9 with Jakobs bogies, which were called the 953 series. The train was equipped with eight different bogies. The train was equipped with two pantographs which were mounted on cars 3 and 7 in chimney-like aerodynamic cladding. The drive of the train was carried out with three-phase motors , of frequency converters in GTO technique have been supplied with power.

It was delivered to JR East in 1992 in the following formation:

dare 1 2 3 4th 5 6th 7th 8th 9
designation Tc M. M ' Ts T M. M ' M. M'c
Car no. 952-1 952-2 952-3 952-4 953-1 953-2 953-3 953-4 953-5
Seats 56 63 72 34 56 48 48 48 46
Weight (t) 30.0 29.9 33.2 25.5 19.4 20.7 21.4 20.4 27.0
Length (mm) 26,250 25,000 25,000 25,000 22,250 18,500 18,500 18,500 25,500

In 1993 the train was equipped with traction motors on all axles in order to achieve a higher drive power. During the conversion, the former car 3 became car 4.

Car body

To reduce air resistance , the cars were built 40 cm less high and 20 cm narrower than those of the Shinkansen class 0 trains that were in use at the time . Of Nippon Sharyo built cars 1 to 3 had box of welded aluminum - extruded sections , identified by Hitachi built carriage 4 and 5 had those made of aluminum honeycomb panels and the carriage 6 to 9 of Kawasaki such from duralumin , similar to an aircraft hulls was constructed . The end cars had a wedge-shaped, laterally only slightly indented head shape, with that of the 952 series differing slightly from that of the 953 series. The bogies are completely covered with aprons to avoid aerodynamic noise.

All cars had a 2 + 2 seating arrangement except for car 4, where the Green Class was accommodated with a 2 + 1 seating arrangement. In car 2 there was a multi-purpose room and a wheelchair compartment,

painting

Cars 1 to 4 and half of car 5 were painted light green, the rest of car 5, as well as car 6 and half of car 7 were snow gray, the rest of the train was beige. A light blue ribbon of windows ran the length of the train.

Web links

Commons : STAR 21  - collection of images, videos and audio files

Individual evidence

  1. Isao Okamoto: Shinkansen Bogies . In: Japan Railway & Transport Review . No. 19 , 1999, p. 48 ( ejrcf.or.jp [PDF]).
  2. Japan Railways (Ed.): 新 幹線 電車 デ ー タ ブ ッ ク - Shinkansen densha dēta bukku . Tokyo 2011, ISBN 978-4-330-19811-8 , pp. 95 (Japanese).
  3. Japan Railways (Ed.): JR 全 車輛 ハ ン ド ブ ッ ク '93 . Neko Publishing, Tokyo 1993 (Japanese).