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John Carver Meadows Frost known as "Jack" (1915 in Walton-on-Thames, England – 9 October 1979 in Auckland, New Zealand) was a British aircraft designer. His primary contributions centred on pioneering supersonic British experimental aircraft and as the chief designer who shepherded Canada's first jet fighter project, the Avro Canada CF-100, to completion. He was also the major force behind the Avro Canada VTOL aircraft projects, particularly as the unheralded creator of the Avro Canada flying saucer projects.