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|  CHAPTER 4
HELICOPTER AERODYNAMICS WORKBOOK
CHAPTER FOUR REVIEW QUESTIONS
1.
_________________________is the self-sustaining rotation of the rotor blades in
unpowered flight.
For unpowered flight, induced flow is perpendicular/parallel to the tip-path-plane and
2.
comes from above/below the rotor disk.
3.
Pro-autorotative force is the vertical/horizontal component of lift/profile drag.
4.
What is the anti-autorotative force in the rotor system?_____________________________
5.
The three conditions required to enter an autorotation are____________, ____________,
and ______________.
6.
How does the flare in an autorotational descent affect the aircraft?____________________
________________________________________
7.
Minimum rate of descent in unpowered flight is achieved by_________________________
_____________________________.
8.
The unshaded areas of the H-V diagram identify the portions of the flight envelope from
which a ____________________can be accomplished in the event of a____________________.
4-12 AUTOROTATION
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