United States. Navy Department. Bureau of Construction and Repair · Washington, Govt. print. off. · leaf 123
115 AIRCRAFT DESIGN DATA. Note 9-VII. AEROFOIL, DURAND PROPELLER SECTION No. 7. SIZE OF MODEL, 18 BY 3 INCHES. VELOCITY OF WIND. 30 M. P. H. WIND TUNNEL, M. I. T.
Airplanes · Airships · Aerodynamics
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
