Original: Bluebird K7 was a turbo jet-engined hydroplane with which the United Kingdom's Donald Campbell set seven world water speed records during the 1950s and 1960s. Campbell lost his life in K7 on January 4, 1967 whilst making a bid to raise the speed record to over 300 m on Coniston Water.
Simplified: Bluebird K7 is a boat built for Donald Campbell to break the World Water Speed Record.