This HIROBO seesaw is offered as a direct replacement-scale accessory for radio-controlled helicopter rotor linkages, intended to restore correct control geometry and maintain flight characteristics. It is presented as an RC-scale part, not for any real aircraft application.
Compatibility is defined by the Eagle/Freya/EX/SX common-parts family listed by Hirobo, so verify your airframe uses the same seesaw outline before installation. The part functions as the mechanical pivot in the swash-to-rotor linkage, influencing cyclic response and control feel when the rest of the linkage geometry is correct.
Installation is straightforward when replacing an existing seesaw: remove the old unit, transfer any required pins or bearings if applicable, and fit the replacement while ensuring linkage alignment and neutral swash plate position. After installation, perform control sweeps and trim checks on the ground to confirm full travel and correct centering before flight.
Tuning role: use this replacement to recover precise cyclic inputs or to eliminate play that can cause inconsistent control feedback. Check that connected pushrods and servos are secured and that there is no binding throughout the collective and cyclic ranges.
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