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D.H. 86 "Express Air Liner" (British) : a four-engine biplane (1934)

NASA Technical Reports Server (NTRS) · leaf 8

An illustration from D.H. 86 "Express Air Liner" (British) : a four-engine biplane, 1934, leaf 8
Pig. 1 H.A.C.A. Aircraft Circular No. 189

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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