East Japan Railway Company and Sumitomo Metal Industries, have cooperated to develop a tilting control system for railway vehicles in order to attain speeds of 120km/h curving velocity on 400m radius curves. For the purpose of ensuring running safety and riding performance for accelerated curving, this system tilts a carbody up to a 7 degree tilting angle using two long-stroke air springs mounted on a bogie. The system was installed in a narrow gauge experimental train and tried out on the running tests for curving speedup.
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