Francis Rogallo - the Lilienthal of the 20th century
The work of the NASA engineer Francis Rogallo led to the development of modern flexible wings and thus a rebirth of Lilienthal's hang glider.
F. Rogallo (1912 - 2009) as an employee of the Langley Research Center of the NASA.
1992: visit fo Francis Mm Rogallo in the Otto Lilienthal
Voice actor: K. Albrecht