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
M. H. Panhwar and Gas Engg., Mehran Univ., of Eng. And Techn., Jamshoro, 5 p. Chiku or Sapodilla the Neglected fruit of Sindh, Newsletter Sindh Society for Horticultural Science SSHS, Karachi/Hyderabad, Vol.I, No.1, 7 p. World rural Women’s Day Celebrated in Hyderabad, Sindh Agriculture, Nov., 1997, 33 p. Earthworms, Vermicasts and vermiculture, Wildlife and Environment, Oct-Dec 1997, pp. 25–29. Mr. M. H. Panhwar died on 21 April 2007 in Latifabad Hyderabad. 2. M. H. Panhwar's Personal web site M. H. Panhwar Muhammad Hussain Panhwar(Sindhi محمد حسين پنهور ) popularly known as M.H. Panhwar was born on 25 December 1925 in village Ibrahim Panhwar