Are prop-rotor blades interchangeable between the left and right prop-rotor system assemblies?

• A. True
• B. False
• C. Not specified
• D. Both

Answer: (B)

Prop-rotor blades are designed to match the specific rotor assembly they belong to, because each side’s hub geometry, balance weights, and pitch-link arrangement are set for opposite rotation directions. The blade roots, weight distribution, and twist are tuned so the left and right systems stay balanced and track correctly through all attitudes. If you tried to swap blades between the left and right assemblies, you’d disturb the rotor balance, alter the center of gravity, and risk interference with the pitch controls and hub, leading to vibration or mechanical issues. For safety and proper performance, blades stay with their designated rotor assembly.