Propeller
            The design of the propeller is pretty traditional to the aircraft of
            their day. It had a sort of a graceful "S" look to it. If you could
            draw a very shallow S, it had a very nice curve. They were very
            slow-turning propellers. Today we have these little toothpick props
            that turn up thousands of rpm. But back then a slow-moving propeller
            was much more efficient. And the propeller [was] made of a variety
            of woods such as mahogany and birch. A very efficient propeller. The
            only drawback with the Demoiselle was if you notice where the
            pilot sits in some of the other photos, you'll see how close the
            propeller is to the pilot's feet, which is something you always are
            aware of when you're flying one of these little airplanes.