Making airplane propellers - Caproni 600 biplane - Propellers being worked out…

Photograph from "Notes on the Caproni 600 biplane," a technical report by S. E. Hutton, circa 1918.

Caption in report: "Making airplane propellers - Caproni 600 biplane. Propellers being worked out by chisels, spoke-shaves, planes, and scrapers."

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