Coniston Water per hour () in "Blue Bird K4". Between 1956 and 1959 Sir Malcolm's son Donald Campbell set four successive records on the lake in "Bluebird K7", a hydroplane. In 1966 Donald Campbell decided that he needed to exceed 300 miles per hour (483 km/h) in order to retain the record. On 4 January 1967, he achieved a top speed of over 320 miles per hour () in "Bluebird K7" on the return leg of a record-breaking attempt. He then lost control of "Bluebird", which somersaulted and crashed, sinking rapidly. Campbell was killed instantly on impact when decapitated by the K7's
Jagdgeschwader 300 the majority to the "Sturmgruppe" attack. "IV. /JG 3" lost nine fighters shot down and three more suffered damage and made crash landings; five pilots were killed. USAAF escort fighters were increasingly effective. On 11 September 1944 "II. (Sturm)/JG 300" lost 13 Fw 190s to P-51 Mustangs, with 10 pilots killed and two wounded. They claimed nine Mustangs, actual Mustang losses was just one 339th Fighter Group P-51, damaged by Flak and shot down by an Me 262. "I. /JG 300", flying top cover lost 13 Bf 109s without claiming a kill. One pilot was killed and one wounded. Major