Theory of flight, 1919

To form power into a lifting body, wrap it and your own body in cloth and animal skin.

 

 

Source: “deHavilland DH-4B Kelly Field 1919.” San Diego Air and Space Museum Archives, catalog number¬†01_00093883,¬†https://www.flickr.com/photos/sdasmarchives/23543473579/in/photostream/. Photoshopped.