Grace's Guide

British Industrial History

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Frank Trounson Hearle

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Francis Trounson Hearle, C.B.E., F.R.Ae.S., M.I.P.E., aeronautical engineer and MD of de Havillands.

1886 Born in Penryn

Apprenticed in marine engineering.

1908 With Geoffrey de Havilland he left the Vanguard Motor Bus Co at Walthamstow in order to collaborate in the building of a flying machine.

1910 Together they achieved their first successful flight

1911 Aeroplane Engineer, boarding at Oxford Road, Farnborough, Hants[1]

c.1912 Went to work for Deperdussin and then for Vickers

1917 Took charge of the experimental shop of the Aircraft Manufacturing Co., Ltd., at Hendon, where Captain de Havilland was chief designer

1919 Joined the Edgware Lodge of the Masons

1920 Became works manager of the De Havilland Aircraft Co when it was formed

Later became general manager of the company

1922 Became a director

1927 he planned an engine factory for the company and had it in production within 16 weeks.

1930 he laid out the Hatfield works

1935 he went to America to negotiate the British Empire manufacturing rights for Hamilton controllable-pitch airscrews

1938 Became managing director of the company

1939 Managing Director of the De Havilland Aircraft Co, lived in Cheshunt with Ione Hearle (b.1885) and Patrick P Hearle, Engineer (Aero Engines) (b.1915)[2]

1954 Retired from the chairmanship of de Havillands

1965 of Bushey Heath when he died[3]

See Also


Sources of Information

  1. 1911 census
  2. 1939 register
  3. National probate calendar
  • Flight 6 August 1954
  • Flight 5 October 1956