What feature does the TH-73A tail rotor utilize to manage dissymmetry of lift?

What feature does the TH-73A tail rotor utilize to manage dissymmetry of lift?

• A. Hinge design
• B. Flexible blades
• C. Fixed pitch
• D. Variable speed

Answer: (A)

The tail rotor of the TH-73A employs a hinge design as its feature to manage dissymmetry of lift. This is essential for maintaining stability and control when the helicopter is in flight. Dissymmetry of lift occurs due to the varying angles of attack on the advancing and retreating blades of the rotor system. The hinge design allows for articulation, enabling the blades to tilt and adjust their angles independently when the rotor is rotating. This articulation compensates for the increased lift on the advancing blade and reduced lift on the retreating blade, effectively balancing the forces acting on the rotor. By managing this dissymmetry, the hinge design contributes to smoother and more controlled flight characteristics, thereby enhancing operational performance and safety. The other options do not specifically address the management of dissymmetry of lift in the same manner that hinge design does. Flexible blades, for instance, offer some ability to absorb loads and reduce stress but do not provide the same level of dynamic adjustment needed for dissymmetry. Fixed pitch does not allow for any adjustment in lift management, and variable speed relates more to the rotor's performance rather than directly addressing the dissymmetry of lift.

The tail rotor of the TH-73A employs a hinge design as its feature to manage dissymmetry of lift. This is essential for maintaining stability and control when the helicopter is in flight. Dissymmetry of lift occurs due to the varying angles of attack on the advancing and retreating blades of the rotor system.

The hinge design allows for articulation, enabling the blades to tilt and adjust their angles independently when the rotor is rotating. This articulation compensates for the increased lift on the advancing blade and reduced lift on the retreating blade, effectively balancing the forces acting on the rotor. By managing this dissymmetry, the hinge design contributes to smoother and more controlled flight characteristics, thereby enhancing operational performance and safety.

The other options do not specifically address the management of dissymmetry of lift in the same manner that hinge design does. Flexible blades, for instance, offer some ability to absorb loads and reduce stress but do not provide the same level of dynamic adjustment needed for dissymmetry. Fixed pitch does not allow for any adjustment in lift management, and variable speed relates more to the rotor's performance rather than directly addressing the dissymmetry of lift.