Today in Aviation History: The Last Boeing B-17 Flying Fortress is Delivered

On April 13, 1945, the final Boeing-built B-17 Flying Fortress was delivered to the U.S. Army Air Forces, marking the end of an era for one of World War II’s most iconic bombers.

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Austin Hancock
The B-17F and B-17G were built by three companies: Boeing at its Plant 2 at Boeing Field in Seattle; Douglas at its Long Beach plant; and Vega (later Lockheed) at its Burbank plant. Photo via Aerovintage.com
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On this day in aviation history—April 13, 1945—we commemorate the 80th anniversary of the delivery of the final Boeing-built B-17 Flying Fortress (s/n 43-39508) during World War II. Completed at Boeing Plant 2 in Seattle, Washington, on April 9, 1945, the aircraft underwent standard testing procedures before its official handover to the U.S. Army Air Forces just four days later.

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Boeing Plant 2 was probably built shortly after in 1936. The photo is looking southeast with Boeing Field itself to the left across the road (Marginal Way). Photo via Aerovintage.com

The Boeing B-17 Flying Fortress played a pivotal role in the Allied victory in Europe, serving as the backbone of the U.S. Army Air Forces’ daylight strategic bombing campaign. Designed to endure heavy damage and still return home, the B-17 earned a legendary reputation among its crews for its resilience in combat. It helped cripple Germany’s war production by relentlessly targeting factories, transportation hubs, and other critical infrastructure.

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Boeing Y1B-17 in flight. Public Domain, U.S. Air Force. Photo from Wikimedia

Powered by four Wright R-1820-97 Cyclone turbo-supercharged radial engines—each delivering 1,200 horsepower—the B-17 had a typical bomb load ranging from 4,500 to 8,000 pounds. The definitive B-17G model bristled with defensive firepower, sporting 13 .50 caliber Browning M2 machine guns positioned in multiple turrets and gun stations. Though it cruised at a relatively modest speed of 182 mph, the Flying Fortress was designed to take punishment and bring its crew home.

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Boeing Y1B-17 with camouflaged paint scheme, assigned to the 20th Bomb Squadron, 2nd Bomb Group, based at Langley Field, Va. Public Domain, U.S. Air Force. Photo from Wikimedia

B-17s were built not only by Boeing, but also under license by Vega (a Lockheed subsidiary) and Douglas Aircraft. In total, 12,731 airframes were produced during the war. Today, only a few dozen B-17s survive. Some are preserved in museums, others are undergoing restoration, and a handful still take to the skies at airshows. These surviving aircraft serve as powerful reminders of the sacrifices made by the men who flew and maintained them—and of the enduring importance of preserving history for future generations.

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The CAF Airbase Arizona’s B-17 Sentimental Journey performing at the 2014 Chino Airshow. Photo from Wikimedia
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Commercial Pilot, CFI, and Museum Entrepreneur, with a subject focus on WWII Aviation. I am dedicated to building flight experience so I can fly WWII Fighters, such as the P-51 Mustang, for museums and airshows, and in the USAF Heritage Flight. I lead and run the Pennington Flight Memorial, to honor local MIA Tuskegee Airman F/O Leland “Sticky” Pennington.
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