Aircraft Engine Data (including recommended fuels and lubricating oils). 6pp of charts for engines from Aeronca thru Wright. Each engine is listed with cylinders, fuel octane, lube oils, h.p., bore/stroke,displ, comp ratio, fuel and oil consumption. Charts are dated January 1942 with "M-517" (military?) at the bottom of each chart. About good, heavy stock paper, 3-hole, light edge stains.