Нашлось в довольно старом источнике вот что:

До последнего времени наиболее распространенными профилями для лопастей воздушных винтов являлись английские винтовые профили (RAF-6).
стр. 5: http://www.reaa.ru/yabbfilesB/Attachments/__________________...

RAF = Royal Aircraft Factory, компания-разработчик
https://en.wikipedia.org/wiki/Royal_Aircraft_Establishment#R...

The Wright brothers had done some of the earliest research on the most effective curvature, or camber, of a wing,
known as an airfoil. But during the early years of powered flight, airfoils for aircraft were essentially hand-built for
each airplane. Before World War I, there had been little research to develop a standardized airfoil section for use
on more than one aircraft. The British government had performed some work at the National Physical Laboratory
(NPL) that led to a series of Royal Aircraft Factory (RAF—not to be confused with the Royal Air Force) airfoils.
https://crgis.ndc.nasa.gov/crgis/images/2/2f/Century_in_Flig...

Видимо, для ветрового колеса такой профиль лопасти тоже используется или использовался.