Hirobo HI2511008 Helicopter Cross Member M3 x 69 — Frame Stiffener  [HI2511008]

Cross Member Impact on Chassis

This part functions as an internal cross member in helicopter frames, helping hold assemblies in the correct positions during flight and maintenance. It is identified by the M3 x 69 sizing used for mounting and spacing checks.

To fit, line the cross member up with the intended mounting points, secure using M3 fasteners appropriate for the M3 x 69 spacing, and confirm alignment with the rotor and drivetrain under normal preload. The M3 x 69 note should be used to confirm fastener length and hole centres.

For tuning, the cross member alters chassis rigidity and part registration which can influence vibration behaviour. When tuning out vibration or misalignment issues, check seating, verify even torque on fasteners, and assess how frame stiffness interacts with other components.