Sunbeam, Wolverhampton, England, started to build aircraft engines in 1912. Louis Coatalen joined Sunbeam as chief engineer in 1909, having previously been Chief Engineer at the Humber company works in Coventry.
In 1912, Sunbeam, located in Wolverhampton, England, started producing aircraft engines.  Louis Coatalen, who had previously served as Chief Engineer at Humber company works in Coventry, joined Sunbeam in 1909 as their chief engineer.