Similarly, https://en.wikipedia.org/wiki/Lawrence_Hargrave https://en.wikipedia.org/wiki/Lawrence_Hargrave is semi-famous in Australia and had his image on a $2

Similarly, https://en.wikipedia.org/wiki/Lawrence_Hargrave https://en.wikipedia.org/wiki/Lawrence_Hargrave is semi-famous in Australia and had his image on a $20 bill. I suspect he is not much known outside Australia. Quote: Among many, three of Hargrave's inventions were particularly significant: . 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.