Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 239
Method of forming propeller of th3 laminated, or layer, type. The layersof wood are glued in the position shown and the blades carved out accord-ing to the sections. Only one blade is shown from the axle to the tip.This will make a right hand propeller. mounting with the glass bead and the two…
Aeronautics
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