Hirobo HI0404001 Mixing Arm for Helicopter Linkage  [HI0404001]

Mixing arm for Hirobo helicopters

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

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

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

For tuning, treat the mixing arm as a fixed linkage point; 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.