In the 20th century Coniston was the scene of many attempts to break the world water speed record. On August 19, 1939 Sir Malcolm Campbell set the record at 141.74 miles per hour (228.108 km/h) in Bluebird K4. Between 1956 and 1959 Sir Malcolm's son Donald Campbell set four successive records on the lake in Bluebird K7, a hydroplane.