Final Water Speed Record Attempt
In 1966, Campbell decided to try once more for a water speed record. This time the target was 300 mph (480 km/h). Bluebird K7 was fitted with a lighter and more powerful Bristol Orpheus engine, taken from a Folland Gnat jet aircraft, which developed 4,500 pounds-force (20,000 N) of thrust. The modified boat was taken back to Coniston in the first week of November 1966. The trials did not go well. The weather was appalling, and K7 suffered an engine failure when her air intakes collapsed and debris was drawn into the engine. By the middle of December, some high-speed runs were made, in excess of 250 mph (400 km/h) but still well below Campbell's existing record. Problems with Bluebird's fuel system meant that the engine could not reach full rpm, and so would not develop maximum power. Eventually, by the end of December, after further modifications to her fuel system, and the repalcement of a fuel pump, the fuel starvation problem was fixed, and Campbell awaited better weather to mount an attempt.
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