First flight of the Boeing B-17 Flying Fortress.

Boeing B-17 Flying Fortress

American WWII-era heavy bomber

The Boeing B-17 Flying Fortress is an American four-engined heavy bomber aircraft developed in the 1930s for the United States Army Air Corps (USAAC). A fast and high-flying bomber, the B-17 dropped more bombs than any other aircraft during World War II, used primarily in the…