Sir John Arthur `` Jack '' Brabham , , ( 2 April 1926 -- 19 May 2014 ) was an Australian racing driver who was Formula One champion in , , and .
Sir John Arthur `` Jack '' Brabham , AO , OBE ( 2 April 1926 -- 19 May 2014 ) was an Australian racing driver who was Formula One champion in 1959 , 1960 and 1966 .