From 1945 to 1955, a British aeronautical company called Napier & Son produced not just one but two versions of an intricate hybrid piston engine, which they named the Napier Nomad. The post-World War ...

Bore and Stroke: 140 mm (5.5 in.) x 130 mm (5.13 in.) With an industrial history dating to the early nineteenth century, D. Napier and Son began building aircraft engines in the World War I era.