11 ноября 1922г.: первый полет многовинтового вертолета №2 конструкции Этьена Омишана, в 1924 году Омишан установил на нем рекорд скорости для вертолетов.

Вертолет четырехвинтовой схемы Э.Эмишена

A SUCCESSFUL FRENCH HELICOPTER: Helicopter, which recently accomplished vertical and horizontal flights at Les Breuils. It covered a circular course, returning to its starting point at a height of from 10 to 15 ft.

Вертолет Э.Эмишена в рекордном полете

A SUCCESSFUL FRENCH HELICOPTER: M. Oehmichen seated in his helicopter, which recently accomplished vertical and horizontal flights at Les Breuils. It covered a circular course, returning to its starting point at a height of from 10 to 15 ft.