The Secret of Flight - Season 1 Episode 6
Watch TV Shows The Secret of Flight HD After the lift, stability and control problems were solved, a propulsive system was needed to make the aircraft fly. The first propulsion device - the propeller - is still in use today. Dr. Lippisch explains the design of the propeller and demonstrates the lifting propeller - the Helicopter Rotor.
- Year: 1959
- Country: United States of America
- Genre: Documentary
- Studio: PBS
- Director: Sam Becker
- Cast: Alexander Lippisch