Source : AB
Quelques explications sur https://en.wikipedia.org/wiki/Clerget_9B
![](https://i1.wp.com/lf5422.com/wp-content/uploads/2019/02/Screenshot-2019-02-09-at-09.27.30.jpg?fit=594%2C596&ssl=1)
The Clerget 9B was a nine-cylinder rotary aircraft engine of the World War I era designed by Pierre Clerget. Manufactured in both France and Great Britain (Gwynnes Limited), it was used on such aircraft as the Sopwith Camel.