What can happen if the rotor brake is applied prematurely?

• A. Reduced engine performance
• B. Potential rotor damage
• C. Improved system efficiency
• D. Enhanced flight safety

Answer: (B)

Applying the rotor brake prematurely can lead to potential rotor damage due to the sudden stop or slowing down of the rotor system. When the rotor is still in motion and the brake is engaged, the forces acting on the rotor blades and the entire rotor assembly can cause stress or deformation. This can compromise the structural integrity of the rotor blades and associated components, leading to costly repairs or even necessitating a full replacement of the rotor system.

Understanding the mechanics at play is crucial. The rotor blades are designed to operate with specific aerodynamic principles in mind; abruptly halting their motion can introduce unwanted stress vectors that they are not designed to handle. Consequently, maintaining appropriate operational protocols, including the correct timing for engaging the rotor brake, is vital for ensuring the longevity and reliability of the lifting system. The other choices do not represent outcomes associated with premature rotor brake application, emphasizing why the potential for rotor damage is the appropriate concern here.