B17 Flying Fortress converted to gunship, the YB-40 story - YouTube
1/72 XB-40 Bomber Escort Conversion - Aircraft - IPMS/USA Forums
1/72 XB-40 Bomber Escort Conversion - Aircraft - IPMS/USA Forums
Medium Bomber | This Day in Aviation
The Boeing YB-40: how the B-17F strategic bomber was turned into a four-engined escort fighter - The Aviation Geek Club
Brilliant Mistakes: The YB-40 | Defense Media Network
The Boeing YB-40: how the B-17F strategic bomber was turned into a four-engined escort fighter - The Aviation Geek Club
ICM 1/72 Avia B-71 Bomber (License-Built SB 2M-100 / ANT-40)- Bulgarian Air Force / Luftwaffe, 72163
Brilliant Mistakes: The YB-40 | Defense Media Network
Brilliant Mistakes: The YB-40 | Defense Media Network
40-2074 | B-17 Bomber Flying Fortress – The Queen Of The Skies
Boeing YB-40 Flying Fortress Escort Bomber – Inch High Guy
File:B-15 bomber (00910460 132).jpg - Wikimedia Commons
Pacific Wrecks - B-17D Flying Fortress 40-3061 Tail 40-5B
1/72 Academy YB-40 - Destroyer Escort by Douglas Conrady
