From Wikipedia, the free encyclopedia The Douglas XB-42 Mixmaster was an experimental bomber aircraft, designed for a high top speed. The unconventional approach was to mount the two engines within the fuselage driving a pair of contra-rotating propellers mounted at the tail, leaving the wing and fuselage clean and free of drag-inducing protrusions. Two prototype aircraft were built, but the end of World War II changed priorities and the advent of the
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