Vtol up for flaps, trim up around 3/4 the way to steady the craft. The Messerschmitt Bf 109, commonly called the Me 109 (most often by Allied aircrew and even amongst the German aces themselves, even though this was not the official German designation), is a German World War II fighter aircraft designed by Willy Messerschmitt and Robert Lusser during the early to mid-1930s. The "Bf 109" designation was issued by the German ministry of aviation and represents the developing company Bayerische Flugzeugwerke (at which the engineer Messerschmitt led the development of the plane) and a rather arbitrary figure. It was one of the first truly modern fighters of the era, including such features as all-metal monocoque construction, a closed canopy, and retractable landing gear. It was powered by a liquid-cooled, inverted-V12 aero engine