YB-40: Prototype B-17 conversion to bomber escort gunship
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Language: English
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What is the full form of YB-40?
YB-40 stands for Prototype B-17 conversion to bomber escort gunship.
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"YB-40." Fullformexpand.com, https://www.fullformexpand.com/yb-40/1022383. Accessed 4 Jan. 2026.
Fullformexpand.com, 2026. "YB-40." Accessed January 4, 2026. https://www.fullformexpand.com/yb-40/1022383.
"YB-40." (n.d.). Fullformexpand.com. Retrieved January 4, 2026, from https://www.fullformexpand.com/yb-40/1022383.
YB-40. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/yb-40/1022383 (Accessed: 4 January 2026).
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