Douglas DB-7 A-20 Havoc Boston - simple

Files with propellers, without propellers and only propellers. From Wikipedia: he Douglas A-20 Havoc (company designation DB-7) is an American medium bomber, attack aircraft, night intruder, night fighter, and reconnaissance aircraft of World War II. It served with several Allied air forces, principally the United States Army Air Forces (USAAF), the Soviet Air Forces (VVS), Soviet Naval Aviation (AVMF), and the Royal Air Force (RAF) of the United Kingdom. A total of 7,478 aircraft were built, of which more than a third served with Soviet units. It was also used by the air forces of Australia, South Africa, France, and the Netherlands during the war, and by Brazil afterwards. The model shows the A-20G version.