Air cooled radials A recent addition uses this source to claim that the Heron head was invented by Gibson Heron at the RAE in 1918 Now Heron is an uncommon name I d expect there to be some involvement whether now or later However I m unconvinced that this Gibson Heron head is at all related to the Heron head The Gibson Heron head is a design for sealing the head of an air cooled radial engine so as to give good thermal transfer and thus avoid valve overheating The Heron head as used by Jaguar is a design for combustion chambers Is there really any overlap