WWII Hillson Bi-mono experimental aircraft designed to test the slip-wing designed where the upper wing can be jettisoned after takeoff.
Previously:
WWII dive bombers attacking ships - GIF
Blohm and Voss Ha 139 floatplane - photo
WWII warplane identification guide - photo
WWII Heinkel He 59 multi-role aircraft - photo
WWII Nakajima G8N heavy bomber - photo
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