Disappointed to not see https://en.wikipedia.org/wiki/Lawrence_Hargrave https://en.wikipedia.org/wiki/Lawrence_Hargrave whose inventions were . study of curved

Disappointed to not see https://en.wikipedia.org/wiki/Lawrence_Hargrave https://en.wikipedia.org/wiki/Lawrence_Hargrave whose inventions were . study of curved aerofoils, particularly designs with a thicker leading edge; . the box kite (1893), which greatly improved the lift to drag ratio of early gliders; . work on the rotary engine, which powered many early flying machines up until about 1920.