Bluebird K7

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Bluebird K7: The jet-powered water speed record boat

Bluebird K7 was Britain’s jet-powered hydroplane that set seven world water speed records with Donald Campbell between 1955 and 1964. It was the first successful jet-powered hydroplane and helped push the water speed record from 178 mph to about 276 mph. Designed by the Norris Brothers, with a steel space frame and an aluminum hull, it was built at Samlesbury and powered by a Metropolitan-Vickers Beryl engine from 1955 to 1966, later replaced by a Bristol Siddeley Orpheus engine in 1966–67 to reach higher speeds.

K7 used a three-point “pickle fork” design with two forward sponsons and one rear. Campbell achieved records at Ullswater and Lake Mead in 1955, then on Coniston Water through the late 1950s. In 1964 he set a record of 276.33 mph at Dumbleyung Lake, Australia, and briefly held both water and land speed records that year.

In 1966 the team upgraded to the Orpheus engine to aim for 300 mph. On 4 January 1967 at Coniston, after a fast second run, K7 became airborne, flipped, and Campbell was killed. The hull sank; his body was recovered in 2001.

The wreck was found in 1996 and recovered in stages by 2007. The boat has since been restored and placed at the Ruskin Museum in Coniston, with ongoing work to allow future demonstrations. As of 2024–2025, K7 has been rebuilt using many original parts and a replacement Orpheus engine, and plans exist to run it again on Coniston Water in 2026.