Published in the interest of increased aircraft production by McGraw-Hill Publishing Company at the request of the Bureau of Aeronautics, United States Navy Department, and the Army Air Forces. The factual material contained in this magazine has the approval of the Bureau of Aeronautics and the Army Air Forces; any editorial opinions expressed are solely those of the Publisher. Format 9-1/4″ x 12″ with approximately 40 pages per issue. The page numbering is continuous through the entire volume.