Joseph Smith III (November 6, 1832 – December 10, 1914) was the eldest surviving son of Joseph Smith, Jr., founder of the Latter Day Saint movement, and Emma Hale Smith.
 Joseph Smith III was the Prophet-President of what became known as the Reorganized Church of Jesus Christ of Latter Day Saints, now called Community of Christ, which considers itself a continuation of the church established by Smith's father in 1830.
 For fifty-four years until his own death, Smith presided over the church.
 Smith's ideas and nature set much of the tone for the church's development.
William Oke Manning (20 October 1879 – 2 April 1958) was an English aeronautical engineer.
 Although none of his aircraft were built in large numbers he is remembered for his English Electric Wren ultralight and his flying-boats.
Hugh Oswald Short, AFRAeS (16 January 1883 – 4 December 1969) was an English aeronautical engineer.
Reginald Joseph Mitchell CBE, FRAeS, (20 May 1895 – 11 June 1937) was an English aeronautical engineer, who worked for Supermarine Aviation.
 Between 1920 and 1936 he designed many aircraft.
 He is best remembered for his racing seaplanes, which culminated in the Supermarine S.6B, and the iconic Second World War fighter, the Supermarine Spitfire.
Alexander Hale Smith (June 2, 1838 – August 12, 1909) was the third surviving son of Joseph Smith and Emma Hale Smith.
 Smith was born in Far West, Missouri, and was named after Alexander Doniphan, who had once refused an extermination order to execute Joseph Smith, then had acted as Joseph's defense attorney during Joseph's incarceration at Liberty Jail.
 Alexander eventually became a senior leader of the Reorganized Church of Jesus Christ of Latter Day Saints (RLDS Church, now Community of Christ).
 Smith served as an apostle and as Presiding Patriarch of the church.
 He became religiously inclined after the April 1862 death of his older brother Frederick G. W. Smith (b. 1836), who had not been baptized, and was baptized on May 25, 1862, in Nauvoo, Illinois, by another older brother, Joseph Smith III.
Polygamy, or plural marriage, in the Church of Jesus Christ of Latter Day Saints probably originated with the founder of Mormonism, Joseph Smith, who taught that polygamy was a divine commandment.
 Smith practiced it personally, by some accounts marrying more than 30 women some of whom had existing marriages to other men.
 Evidence for Smith's position is provided by the church's "sealing" records, public marriage licenses (in many cases notarized), affidavits, letters, and journals and diaries; however, until his death, Smith and the leading church quorums denied that he preached or practiced polygamy.
 Smith's son Joseph Smith III, his widow Emma Smith, and the Reorganized Church of Jesus Christ of Latter Day Saints (RLDS Church, now called the Community of Christ) challenged the evidence and taught that Joseph Smith had opposed polygamy.
 They instead claimed that Brigham Young, the head of The Church of Jesus Christ of Latter-day Saints (LDS Church), introduced plural marriage after Smith's death.
 In 1852, leaders of the Utah-based LDS Church acknowledged that Smith taught and practiced polygamy.
Ralph Spenser Hooper OBE FREng FRAeS (born 30 January 1926) is an English aeronautical engineer, recognised mostly for his work on the Hawker Siddeley Harrier, specifically in relation to the marriage between the Pegasus engine and the layout of the aircraft, allowing it to safely hover with margins of stability.
Adrian Albert "Lom" Lombard, CBE (19 January 1915 – 13 July 1967) was an English aeronautical engineer.
 Despite having no formal training in aerodynamics, he became one of the world's foremost designers of jet engines.
 He was involved with the Rolls-Royce company in a variety of roles for almost 30 years.
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.
Graham Dorrington (born in Chalfont St. Giles), is an English aeronautical engineer.
 He received his PhD from the University of Cambridge in 1989 and was formerly a lecturer at Queen Mary, University of London, though he is now teaching at RMIT University in Melbourne, Australia.
 He was the subject of the film "The White Diamond" (2004) directed by Werner Herzog.

Question: Joseph Smith took over upon the death of what English aeronautical engineer born in 1895
Answer: R. J. Mitchell