Nemeth Parasol airplane.
https://diqn32j8nouaz.cloudfront.net...asol_plane.jpg
More:
https://disciplesofflight.com/nemeth...ange-aircraft/
https://books.google.com/books?id=nF...0Plane&f=false
Previously:
https://www.homemadetools.net/forum/...151#post138299
https://www.homemadetools.net/forum/...657#post136540
https://www.homemadetools.net/forum/...399#post122142
https://www.homemadetools.net/forum/...3246#post77725
