In 1966 Donald Campbell decided that he needed to get over 300 miles per hour (483 km/h) to keep the record. On January 4, 1967 he achieved a top speed of over 320 miles per hour (515 km/h) in Bluebird K7 on the return leg of a record-breaking attempt. He then lost control of Bluebird, which somersaulted and crashed, sinking rapidly. Campbell was killed instantly on impact. The attempt could not be counted as a record-breaking run because the second leg was not completed.