As I have received a question from a member about how to shape the propeller blade of Zero fighter, please let me introduce it here.
Till end of 2003, I was working for a subsidiary maker of Sumitomo Metal Industries to manufacture landing gears as well as propellers for patrol planes. That factory was using a French-made computerized 3D milling machine to shape the blade, but in the 1940s, I heard it was done by a copier lathe.
I trially made a GIF animation to introduce the lathing work taken from a French movie 'Stuka'.
The other attached image shows the moulds for Zero fighter propeller used by Sumitomo.
Thanks.