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3.3.  CONTROLS

The sketch in figure 3.3 shows the main rotor, cyclic and collective controls, antitorque pedals, and antitorque rotor. Basically, the cyclic control is a mechanical linkage used to change the pitch of the main rotor blades. Pitch change is accomplished at a specific point in the plane of rotation to tilt the main rotor disc. Most of the helicopters now in the Army inventory have hydraulic assistance in addition to the mechanical linkage. The collective pitch is the control that changes the pitch of all the main rotor blades equally and simultaneously. The antitorque pedals are used to adjust the pitch in the antitorque rotor blades to compensate for main rotor torque. Torque is explained in paragraph 3.5.

Figure 3.3. Helicopter Controls.

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