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|  CHAPTER 4
HELICOPTER AERODYNAMICS WORKBOOK
CHAPTER FOUR REVIEW ANSWERS
1.
autorotation
2.
perpendicular . . . below
3.
horizontal . . . lift
4.
in-plane drag
5.
lower collective, reverse airflow, control Nr
6.
reduce rate of descent, reduce forward airspeed, increase Nr
7.
flying at max endurance/loiter airspeed with minimum rate of descent rotor speed
8.
safe landing . . . loss of engine power
4-14 AUTOROTATION
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