Boeing XB-38 Flying Fortress Boeing XB-38 Flying Fortress The XB-38 Flying Fortress was a single example conversion of a production B-17E Flying Fortress, testing whether the Allison V-1710 V type engine could be substituted for the standard Wright R-1820 radial engine during early World War II. The XB-38 was the result of a modification project undertaken by Boeing and Vega (a subsidiary of Lockheed) on a B-17 Flying Fortress to fit it with liquid-cooled Allison V-1710-89 Vee engine. It was meant as an improved version of the B-17, and a variant that could be used if air-cooled Wright R-1820 radial engines became scarce. Completing
B-17G "Flying Fortress" No. 44-83690 B-17G "Flying Fortress" No. 44-83690 B-17G-95-DL "Flying Fortress" No. 44-83690 is a historic B-17 Flying Fortress Heavy bomber located at the Aviation Museum, Grissom Air Force Base in Pipe Creek Township, Miami County, Indiana. It was built by the Douglas Aircraft Company and delivered for use on May 9, 1945. It was flown to Grissom Air Force Base for display as a museum piece in 1961, and subsequently restored. It was listed on the National Register of Historic Places in 1993. It was moved to the Museum of Aviation in Warner Robins, Georgia in August 2015. 44-83690 is a G-series