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.
John Penn (engineer) John Penn FRS (1805–1878) was an English marine engineer whose firm was pre-eminent in the middle of the 19th century due to his innovations in engine and propeller systems, which led his firm to be the major supplier to the Royal Navy as it made the transition from sail to steam power. He was also president of the Institution of Mechanical Engineers on two occasions.