In aviation, "Luft '46" refers to millitary aircraft that were under development in Nazi
Germany, but failed to enter service (at least in large numbers) before the end of World War 2. This includes projects that were cancelled during the war, and occasionally real postwar aircraft derived from
German research, such as the MiG-15. Most "Luft '46" aircraft are of advanced design, usually having swept wings and
jet/rocket engines. Despite being associated the
Nazi Luftwaffe, Luft '46 fandom does not worship Nazism or Adolph Hitler, but rather aviation as well as speculative fiction.