Samuel Dalziel Heron

Samuel Dalziel Heron
Born18 May 1891
Newcastle-upon-Tyne, England
Died10 July 1963 (1963-07-11) (aged 72)
Engineering career
DisciplineAircraft Engine Design
Employer(s)Royal Aircraft Factory, Siddeley-Deasy, Ethyl Corporation
Significant designHeron cylinder head
Significant advanceSodium cooled poppet valves

Samuel Dalziel Heron (18 May 1891 – 10 July 1963) was a British born aerospace engineer who made major contributions to the design of piston engines. While working in Britain he carried out the first systematic research into air-cooled cylinders. In the U.S.A he contributed to the design of the Curtiss R-1454, invented the sodium cooled poppet valve and became technical director for aeronautical research for the Ethyl Corporation.