The Salmson 9 AD was a family of air-cooled nine cylinder

radial Radial is a geometric term of location which may refer to: Mathematics and Direction * Vector (geometric) In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) ...

aero-engines produced in the 1930s in

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

by the

Société des Moteurs Salmson Salmson is a French engineering company. Initially a pump manufacturer, it turned to automobile and aeroplane manufacturing in the 20th century, returning to pump manufacturing in the 1960s, and re-expanded to a number of products and services ...

Design and development

The 9 AD followed Salmson practice after the

First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

, of being air-cooled and utilising the Canton-Unne epicyclic geared crank-case system. The major attributes of the engine include a bore of and stroke of .

Variants

;9 AD:The standard production model with LH rotation direct drive. ;9 ADb: ;9 ADr: ;British Salmson AD.9:Production of the Salmson 9AD in

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

by the British Salmson Company at

New Malden, Surrey New Malden is an area in South West London, England. It is located mainly within the Royal Borough of Kingston upon Thames and the London Borough of Merton, and is from Charing Cross. Neighbouring localities include Kingston, Norbiton, Raynes ...

. ;British Salmson A.D.9R srsIII:The A.D.9 with a 0.5:1 reduction gear

Applications

Specifications (9 AD)

Notes

References