Aviation Standard Test Battery-E (ASTB E) Practice Test

What is the function of the collective control in a helicopter?

1. To control yaw rotation

2. To manage altitude and climb rate

3. To adjust speed during descent

4. To stabilize lateral movement

The correct answer is: To manage altitude and climb rate

The function of the collective control in a helicopter primarily involves managing altitude and climb rate. This control is synonymous with adjusting the angle of the rotor blades collectively, which in turn increases or decreases the lift produced by the rotors. When the pilot pulls on the collective, it raises the pitch of all rotor blades simultaneously, resulting in increased lift and allowing the helicopter to climb. Conversely, lowering the collective decreases lift, enabling the helicopter to descend. The other functions represented in the choices serve different purposes in helicopter flight. Yaw rotation is controlled by the tail rotor, while speed during descent is managed by the cyclic control and the collective in tandem rather than through collective alone. Additionally, lateral movement stabilization is achieved by using the cyclic to tilt the rotor disk and change direction. Thus, the correct answer centers on the vital role of the collective in altitude and climb rate management, which is essential for effective helicopter operation.