Explain basic flight principles of a helicopter. How is thrust produced? How is lift produced? How do flight controls operate in a helicopter? Is there drag during helicopter flight? What is translational lift? What happens if when helicopter losses engine(s) power? (make illustrations)
Explain basic flight principles of a gas balloons, hot-air balloons, and airships. How is thrust produced? How is lift produced? How is flight control achieved in gas and hot air balloons and how in airships? What happens if the burner fails in free hot air balloons? What are various emergencies in hot air balloons and in airships? How is gas-balloon different from hot-air-balloon? (make illustrations)

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