Joseph Smith took over upon the death of what English aeronautical engineer born in 1895
Joseph Smith (aircraft designer) Joseph ("Joe") Smith CBE (25 May 1897 – 20 February 1956) was an English aircraft designer who took over as Chief Designer for Supermarine upon the death of R. J. Mitchell and led the team responsible for the subsequent development of the Supermarine Spitfire.
Harry Ferguson Henry George "Harry" Ferguson (4 November 188425 October 1960) was an Irish-born British engineer and inventor who is noted for his role in the development of the modern agricultural tractor, for being the first person in Ireland to build and fly his own aeroplane, and for developing the first four-wheel drive Formula One car, the Ferguson P99.