Home Archive Search Media Media-458344.jpg FRE 10927 IMAGE Download Image By downloading this image, you are agreeing to our Terms and Conditions A technical diagram of the design layout of a YB-40, the gunship modification to the B-17 Flying Fortress airframe. Revisions Date: 2 Feb 2015 10:00:17 ContributorAAMChangesAAM ingestSourcesIWM, Roger Freeman Collection