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| HELICOPTER AERODYNAMICS WORKBOOK
CHAPTER 3
POWER REQUIRED
Now, we've discussed how rotor blades and rotor systems work, let's investigate how they
work with a helicopter fuselage and all of the forces that come into play. For a helicopter to
remain in steady, level flight, these forces and moments must balance. These forces (figure 3-1)
exist in the vertical plane, horizontal plane, and about the center of gravity in the form of
pitching moments.
Figure 3-1
To begin the discussion of these forces, we will discuss the power required which produces
these forces (figure 3-2).
Figure 3-2
HELICOPTER POWERED FLIGHT ANALYSIS 3-3
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