The Boeing YB9 (Also known as the Model 214/215/246) was the company's first allmetal bomber design. In 1930, the bomber squadrons operated by the US Army Air Crops mostly consisted of slow biplanes. Boeing had recently built its successful allmetal Monomail trainsport, and wanted to use their experience to build something bigger.

When complete, the YB9 was able to outrun most conventional fighters at the time, thanks to a light airframe, sleek design, and powerful engines. Though the Army Air Corps tests looked promising, no large production orders were made as Glen Martin Company had brought out its own design which would go on to become the Martin B10.

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Producing these videos is a hobby of mine. I have a passion for history, and personally own a large collection of books, journals and other texts, and endeavor to do as much research as possible. However if there are any mistakes, please don't hesitate to reach out and correct anything :)

Sources:

https://www.amazon.com.au/BoeingAirc...

https://www.amazon.com/UnitedStates...