Helicopter In New Tests “Turns Turtle” (1928)“Auto-giro” plane makes successful ascent and then collapses
Hellett “Auto-Giro” with 165 H.P. Continental “A-70” Engine us being tested to study it’s possible use in the Air Corps.
Helicopter In New Tests “Turns Turtle” (1928)“Auto-giro” plane makes successful ascent and then collapses
Hellett “Auto-Giro” with 165 H.P. Continental “A-70” Engine us being tested to study it’s possible use in the Air Corps.