Hirobo's HI0412213 mixing arm is designed for the Sceadu Evolution FZ-4 rotor head and provides the linkage that controls mixing between cyclic and collective inputs. Proper geometry is essential for responsive controls and stable trim.
Offered as a spare or direct replacement for the Sceadu Evolution FZ-4 head linkage, it is intended where accurate mixing behaviour is required. During replacement, confirm pivot seating and free play, and then verify swash travel along with servo endpoints.
When tuning, note that small changes to arm alignment or play will affect pitch curve and cyclic authority; recheck hover trim and low-speed handling after any adjustment. This product is for RC hobby use only.
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