Andrew Vanis sends:

Laurent de Kalbermatten

Flying has been at the heart of Kalbermatten’s world since he was a teenager. At
just 18 years old he became Swiss hang gliding national champion in 1974.

Read more at
https://www.yachtingworld.com/extraordinary-boats/inflated-wing-sail-121282

https://en.m.wikipedia.org/wiki/Kalbermatten_Woopy