Boeing Model 299 from the left

Boeing Model 299 from the left
Here we see the Boeing Model 299, the first prototype for the B-17 Flying Fortress. This aircraft made its maiden flight in 1935, giving the United States one of the earliest four engined heavy bombers.
How to cite this article: Rickard, J (7 April 2019), Boeing Model 299 from the left , http://www.historyofwar.org/Pictures/pictures_boeing_model_299.html

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