BMW
After the end of World War I in 1918, BMW was forced to cease aircraft engine production by the terms of the Versailles Armistice Treaty. To remain in business, BMW produced farm equipment, household items and railway brakes. In 1922, former major shareholder Camillo Castiglioni purchased the rights to the name BMW, which led to the company descended from Rapp Motorenwerke being renamed Süddeutsche Bremse AG (known today as Knorr-Bremse). Castiglioni was also an investor in another aircraft company, called "Bayerische Flugzeugwerke", which he renamed BMW.The disused factory of Bayerische Flugzeugwerke was re-opened to produce engines for buses, trucks, farm equipment and pumps, under the brand name BMW. BMW's corporate history considers the founding date of Bayerische Flugzeugwerke (7 March 1916) to be the birth of the company.
History of BMW
Rapp was sub-contracted by Austro-Daimler to manufacture their V12 aircraft engines. Austro-Daimler at the time was unable to meet its own demands to build V12 Aero engines. The officer supervising aero-engine building at Austro-Daimler on behalf of the Austrian government was Franz Josef Popp. When it was decided to produce Austro-Daimler engines at Rapp Motorenwerke, Popp was delegated to Munich from Vienna to supervise engine quality.