The Secret of Flight - Season 1 Episode 6 Эпизод 6
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.
- Жанр: Documentary
- Студия: PBS
- Ключевое слово: educational, historical documentary
- В ролях: Alexander Lippisch
"
