Douglas O-31

ISBN 13: 9786135599466

Douglas O-31

 
9786135599466: Douglas O-31

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The O-31 was Douglas Aircraft Company's first monoplane observation straight-wing aircraft used by the United States Army Air Corps. Anxious to retain its position as chief supplier of observation aircraft to the USAAC, Douglas developed a proposal for a high-wing monoplane successor to the O- 2.

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