The Boeing B-17 Flying Fortress was a four-engine, long-range aircraft family developed from the Model 299, which first flew in 1935. Built in progressively refined variants by Boeing, Douglas, and Lockheed-Vega, it became a defining American heavy aircraft of the Second World War and also served in reconnaissance, transport, air-sea rescue, and airborne early-warning adaptations.
Alerts for directly linked future launches and major activity.