Boeing B-17 Flying Fortress NAN10-50.jpg|thumb|B-17 modified for testing of the [[Pratt & Whitney T34|XT-34 turboprop]]. When testing concluded, the aircraft was restored to stock configuration as the "[[Liberty Belle (B-17)|Liberty Belle]]", but was lost in a post-forced-landing fire near [[Oswego, Illinois]] on 13 June 2011.]] [[Category:Boeing aircraft|B-17 Flying Fortress]] [[Category:United States bomber aircraft 1930–1939]] [[Category:Four-engined tractor aircraft]] [[Category:Low-wing aircraft]] [[Category:World War II bombers of the United States]] [[Category:Boeing B-17 Flying Fortress| ]] [[Category:Aircraft first flown in 1935]] Boeing B-17 Flying Fortress The Boeing B-17 Flying Fortress is a four-engined heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Competing
The Centaur Company had the company represented by Barnum's famous circus star Jumbo, the giant elephant. Another ad featured the legendary boxer Joe Louis. In the 1920s, Centaur was one of the earliest advertisers targeting women directly. "Their advertising prior to that had targeted both men and women, but here [in the 1920s] they began to advertise additionally in the new publications specifically targeted to women." There were three "Fletcher's Castoria" B-17 Flying Fortress bombers during World War II, part of the 100th Bomber Group. The first was lost, but the crew survived. The second survived the war. Its pilot was William H.