David C. Curwen (30 November 1913 – 26 May 2011) was an English miniature railway steam locomotive mechanical engineer. Born in Sydenham, South London, and educated at King's School, Canterbury, Curwen worked from 1935-45 for Short Brothers in Rochester as an aircraft engineer. In 1946, he established his own engineering firm, Baydon. In 1950 he married Barbara Willans, an actress. In 1951 he became Chief Mechanical Engineer (CME) of the Talyllyn Railway in Wales for its first year of preservation.