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Voler à 55 Kmh ? - LF5422 Micheville
Lire sur aerovfr Sur le Helio Courrier : https://en.wikipedia.org/wiki/Helio_Courier Et https://en.wikipedia.org/wiki/Otto_C._Koppen In 1949, Koppen, and Lynn Bollinger formed the Helio Corporation of Massachusetts. They developed a « helioplane » prototype for a cost of 6000 dollars that was built based on a modified Piper Vagabond with a short wing, with leading edge slats, with high lift and STOL capabilities.[13] Greater Boston Metropolitan Airport fixed-base operator, …