What is used to track and balance a HH65?

• A. ROTORTUNER RT-5JS
• B. ROTORTUNER RT-4JS
• C. Aileron balancing stand
• D. Vibration analyzer

Answer: (A)

Tracking and balancing the rotor relies on a specialized rotor tuning instrument rather than general vibration tools. For the HH65, you use a Rotortuner to measure each blade’s track and balance so all blades run in phase and the rotor’s vibration is minimized. The Rotortuner RT-5JS is the specific device configured for the HH65’s rotor system, providing the necessary sensors and procedures to locate track errors and determine the weight adjustments needed to balance the rotor. The other options don’t perform this coordinated tracking-and-balancing function: a vibration analyzer diagnoses overall vibration levels but doesn’t directly track blade alignment or balance; an aileron balancing stand is for fixed-wing control surfaces and not applicable to a helicopter rotor; and the RT-4JS is a different model of Rotortuner used for other rotor configurations.