Eagle/Freya/EX/SX Mixing Arm for Rotor Linkage - Hirobo HI0404001  [HI0404001]

Direct-fit mixing arm for Hirobo rotor linkages

This mixing arm is an RC-scale replacement part listed under Hirobo common helicopter parts for Eagle, Freya, EX and SX platforms. It functions as the mechanical interface in the linkage that blends servo outputs for rotor pitch and tail mixing on model helicopters.

Use this component when restoring original linkage geometry or replacing a worn or damaged mixing arm. Fitment follows the standard mounting points used across Hirobo Eagle/Freya/EX/SX common parts, so confirm your airframe uses those mounts before ordering.

Installation notes: remove the swashplate and servo linkages as needed to access the old mixing arm, transfer any bearings or pins to the replacement if required, and re-check for free play and smooth movement through the full collective and tail range. After installation, verify neutral blade pitch and adjust transmitter mixing and servo end-points to restore correct rotor response.

For tuning, treat the mixing arm as a fixed linkage pivot; small changes to control feel should be handled through transmitter mixing curves or by altering linkage lengths at the outer rod ends rather than modifying the mixing arm itself.