Land Speed Record Attempt
In 1956, Campbell began planning a car to break the land speed record, which then stood at 394 mph (634 km/h). The Norris brothers designed Bluebird-Proteus CN7 with 500 mph (800 km/h) in mind. The CN7 was completed by the spring of 1960, and was powered by a Bristol-Siddeley Proteus free-turbine engine of 4,450 shp (3,320 kW). Following low-speed tests conducted at the Goodwood circuit in Sussex, England, the CN7 was taken to the Bonneville Salt Flats in Utah, USA, scene of his father's last LSR triumph in 1935. The attempt was unsuccessful and CN7 was written off following a high-speed crash in September at Bonneville. Campbell was seriously hurt, suffering a fracture to his lower skull, and was by 1961 on the road to recovery and planning the rebuild of CN7.
The rebuilt car was completed, with minor modifications, in 1962 and, by the end of the year, was shipped to Australia for a new attempt at Lake Eyre in 1963. The Lake Eyre location was chosen as it offered 450 square miles (1,170 km2) of dried salt lake, where rain had not fallen in the previous 20 years, and the surface of the 20-mile (32 km) track was as hard as concrete. As Campbell arrived in late March, with a view to a May attempt, the first light rain fell. Campbell and Bluebird were running by early May but once again more rain fell, and low-speed test runs could not progress into the higher speed ranges. By late May, the rain became torrential, and the lake was flooded. Campbell had to move the CN7 off the lake in the middle of the night to save the car from being submerged by the rising flood waters. The 1963 attempt was over.
Campbell and his team returned to Lake Eyre in 1964, but the surface never returned to the promise it had held in 1962 and Campbell had to battle with CN7 to reach record speeds (over 400 mph (640 km/h)). After more light rain in June, the lake finally began to dry enough for an attempt to be made. On 17 July 1964, Campbell set a record of 403.10 mph (648.73 km/h) for a four-wheeled vehicle (Class A). Campbell was disappointed with the record as the vehicle had been designed for much higher speeds. CN7 covered the final third of the measured mile at an average of 429 mph (690 km/h), peaking as it left the measured distance at over 440 mph (710 km/h).
In 1969, after Campbell's fatal accident, his widow, Tonia Bern-Campbell negotiated a deal with Lynn Garrison, President of Craig Breedlove and Associates, that would see Craig Breedlove run Bluebird on Bonneville's Salt Flats. This concept was cancelled when the parallel Spirit of America supersonic car project failed to find support.
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