This is one of seven propeller artifacts donated by the U.S. Army that powered airships between 1919 and 1925. It was used on Renault V-12 engines for French Zodiac airships during World War I. Zodiacs were purchased from the French Government following the war, and flown at the Langley Air Station in 1920.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.