F-9 Flying Fortress

During World War II, several B-17 Flying Fortresses were converted to long-range photographic reconnaissance aircraft, designated F-9 Flying Fortress. (The F- here stands for 'fotorecon' and must not be confused with F- for 'fighter', which was not introduced until after the war.)

The first F-9 aircraft were sixteen B-17Fs, with bombing equipment replaced by photographic equipment. Some of the defensive armament was kept. An uncertain number more were converted to a similar configuration to the F-9, but differed in minor details of their cameras, and received the designation F-9A. Some of these, along with more B-17Fs, received further camera alterations and became the F-9B. The last variants was the F-9C, which was given to ten B-17G, converted in a similar fashion to the previous plances. Those surviving in 1948 were redesignated RB-17G (R indicating 'reconnaissance').

References and external links

• Encyclopedia of American Aircraft
• List of F- reconnaissance aircraft

Related content

Related development: B-17 Flying Fortress

Comparable aircraft: F-7 Liberator

Designation sequence: F-6 - F-7 - F-8 - F-9 - F-10 - XF-11 - XF-12

Related lists: List of military aircraft of the United States - List of military reconnaissance aircraft