The first aircraft engine manufactured by Daimler was the 80 hp Gnome Monosoupape rotary. With no drawings available to them, Daimler's Gnome engines were reverse-engineered from an engine delivered to them on 7 August 1914.[74] Daimler later built the RAF 1 and 1a air-cooled V8s, the RAF 4 and 4a V12s, the Le Rhone rotary, and the Bentley BR2 rotary alongside other manufacturers.[75] Production of RAF 4 engines gave Daimler experience in building V12 engines which would be appreciated when they later designed and built "Double-Six" V12 engines for their large cars.[76]