Micarta Propellers II : Method of Construction
This is a 1924 National Advisory Committee for Aeronautics technical note, Technical Note No. 199, on how Micarta propellers were built, issued by the US government aeronautics research body for engineers and aircraft designers. The pictures are plain black-and-white photographs of factory machinery, a moulded blade section and a finished propeller, with one diagram of a blade cross-section plotted on axes; a designer might take from them the period look of industrial workshop photography and technical plate layout.
