It is an American propeller type strategic bomber. The B-29 bomber is a flat wing four engine aerodynamic layout, named after the B-17 bomber. It was the main bomber of the US Army Air Forces in the Asian theater of World War II and the largest aircraft in the air forces of various countries at that time. This aircraft is mainly used for strategic bombing and long-range bombing missions, and can also be used as an anti submarine, reconnaissance, and aerial refueling aircraft. It utilizes advanced technology at the time and is known as a "super air fortress". The first flight took place on September 21, 1942, and in August 1945, atomic bombs were dropped on Hiroshima and Nagasaki in Japan.