Duplicating an Wooden Propeller at 'Culver Props' using the Lathe Duplicator. ✔ What material do they Use to Fabricate the Propeller ? 👉 Best of the North American hard maple and birch wood ! ✔ A little info on Culver Props ! 👉 Culver Props Inc, was an American manufacturer of wooden propellers for homebuilt and ultralight aircraft. In 2001 the company ceased production and was purchased by Valley Engineering LLC. 👉 Valley Engineering turned the company into a brand of propellers, which remai