Hirobo HI0404652 tail boom brace set for Eagle/Freya/EX/SX helicopters  [HI0404652]

Tail boom brace overview

This is an RC-scale tail boom brace set designed for use with Hirobo Eagle, Freya, EX and SX helicopter common parts. The HI0404652 designation indicates the factory part reference and L=500 identifies the brace length used to match the tail boom span on those platforms.

The brace's role is primarily structural: it helps keep the tail boom aligned under load and provides a predictable baseline when adjusting tail rigidity and dampening. In practice this reduces play between boom supports and makes fine tuning of tail pitch and yaw response more consistent during test flights.

Installation notes for model builders and tuners:

• Position the brace along the tail boom so mounting points align with the helicopter's existing boom supports and clamps.
• Ensure fasteners are torqued evenly to avoid bending the boom or introducing preload that skews alignment.
• After fitting, check tail rotor tracking and tail pitch response at low throttle, then re-check under hover to confirm stability changes.

Practical tuning tips:

• Increase overall tail rigidity incrementally and test between changes; small adjustments can have noticeable effects on tail responsiveness.
• If vibration appears after fitting the brace, verify mounting symmetry and boom straightness before altering other components such as the tail rotor or gyroscope gains.
• Use the brace as part of a holistic tail setup process alongside correct linkage geometry and servo centring checks.