Three wooden airscrew construction types were still being made in 1944. They refined methods used in the 1920s. In the Airscrew Company example, Douglas fir boards formed a glued blank, with a joint at the root end. Carving then gave the blank its blade shape.
Chapter · 0:09-0:44
Three ways to build a wooden airscrew
The opening distinguishes three wooden airscrew construction methods being produced by 1944 and traces them to techniques developed in the 1920s.