SIFT Army Aviation Information Practice Test

Which of the following components can be part of a helicopter's main rotor system?

1. A stabilizer bar, upper and lower swash plates, and counterweights

2. Pitch horns, teeter or coning hinges, and blade grips

3. Pitch and scissor links, and control rods

4. All the above

The correct answer is: All the above

The correct choice acknowledges that all the listed components can indeed be part of a helicopter's main rotor system. The stabilizer bar, upper and lower swash plates, and counterweights contribute to the stability and control of the rotor system, helping to manage the forces and movements that occur during flight. Pitch horns, teeter or coning hinges, and blade grips are integral to the mechanism that allows the rotor blades to alter pitch and facilitate control over the helicopter's flight dynamics. Additionally, pitch and scissor links, along with control rods, are essential for transmitting pilot inputs into the rotor system, ensuring that the blades respond appropriately to control maneuvers. Because all these components play crucial roles in the operation and efficiency of a helicopter's main rotor system, the answer encompasses the full range of potential parts involved in this complex system.