John Coplin (1934-), aeronautical engineer, was chief designer of the Rolls-Royce’s RB211 aero-engine from 1968-1977 before taking on senior management roles within the company, including Director of Technology and Design. He served on a number of government committees including the Ministry of Defence Aerospace Technology Board, which he chaired from 1984-5. During the 1990s he was United Kingdom Scienceand Technology advisor to the Indonesian Government. On his return to the United Kingdom he was one of the founders and the chairman of Hiflux Ltd, a firm specialising in high-temperature heat exchangers. He has been a Fellow of the Royal Academy of Engineering since 1980.
- Birth name: John Coplin
- Born: 1934 Coventry, UK
- Occupation: Aeronautical engineer
- Disciplines: Aeronautical Engineering
- Education: Imperial College, London