The Boeing Model 307 Stratoliner (or Strato-Clipper in Pan American service, or C-75 in USAAF service) is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered commercial service in July 1940.

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Mar 13, 2024 · Instead of wasting valuable work hours and resources designing an entirely new plane from scratch, the manufacturer modified its B-17 Flying Fortress to build a quad-engine airliner known as the Boeing 307 Stratoliner.

The Boeing Model 307 Stratoliner was the first fully pressurized airliner to enter service anywhere in the world. Being able to fly 20,000 feet higher than the 5,000 to 10,000 foot-altitude unpressurized airplanes a that time, it was said that it could "fly above the weather."

The Boeing C-137 Stratoliner is a retired VIP transport aircraft derived from the Boeing 707 jet airliner used by the United States Air Force. Other nations also bought both new and used 707s for military service, primarily as VIP or tanker transports.

Jul 6, 2023 · The Boeing Model 307 'Stratoliner made' history when it performed its first flight on December 31st, 1938, as it became the world's first commercially-produced passenger aircraft to hold a pressurized cabin.

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The Boeing Model 307 Stratoliner was the first commercial transport aircraft with a pressurized cabin. This feature allowed the plane to cruise at an altitude of 20,000 ft (6,000 m), well above weather disturbances.

Apr 2, 2018 · On March 18, 1939, Julius Barr piloted a prototype Stratoliner destined for Pan Am during a routine test flight at Alder, Wash., near Mount Rainier. It crashed, killing all aboard, including representatives of KLM Royal Dutch Airlines.

Oct 10, 2017 · Page details technical specifications, development, and operational history of the Boeing 307 Stratoliner (C-75) Four-Engine Passenger Airliner / VIP Transport Aircraft including pictures.