Douglas Y1B-7
The Douglas B-7 was a 1930s United States bomber aircraft. It was the first US monoplane given the B- 'bomber' designation. The monoplane was more practical and less expensive than the biplane, and the United States Army Air Corps chose to experiment with monoplanes for this reason. At the time the XB-7 was ordered, it was being tested by Douglas Aircraft as an observational plane.
Read more about Douglas Y1B-7: Design and Development, Operational History, Operators, Specifications (Y1B-7)
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“You can tell the ideals of a nation by its advertisements.”
—Norman Douglas (1868–1952)