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[Notebook of U.S. Army Air Service serviceman J. M. Wilson, circa July 1917] (Item)

Notebook of U.S. Army Air Service serviceman J. M. Wilson, circa July 1917. A4 sized, lined notebook containing notes on World War I-era aircraft engines such as Le Rhône, Beardmore, Salmson and Gnome, along with notes on aircraft rigging and other related subjects. Includes a diagram for Le Rhône valve timing and a chart comparing common aircraft engines.