Watch The Secret of Flight Season 1 Episode 6 Online
- COUNTRIES: United States of America
- Subtitles: English
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.
