Hirobo HI0412186 SCEADU SZ-IV seesaw tail link part  [HI0412186]

Sceadu SZ-IV seesaw tail link

The HI0412186 seesaw tail link is an RC-scale replacement part for the Hirobo Sceadu SZ-IV lineup. It serves as a small mechanical linkage in the tail assembly that influences pitch balance and the response of the tail control system. This write-up explains fitment considerations, basic installation checks, and how the piece affects trimming and tuning.

Compatibility: Designed for the Sceadu SZ-IV family of models where the original seesaw/lever element is required. Confirm part numbering on the original assembly before ordering to ensure direct replacement without modification.

Installation notes: Inspect the mating pin and surrounding bearings for wear before fitment, remove any burrs, and verify free movement through the full travel of the tail control. Lightly lubricate any steel-on-steel contact points with a thin machine oil and avoid over-tightening retaining hardware to preserve articulation.

Tuning role: As a small geometry component in the tail linkage, its length and pivot condition can subtly change tail authority and trim. Replace worn units to restore predictable trim, and use small servo adjustments during bench tests to confirm neutral tail position before a flight check.

Use this genuine Hirobo part when restoring original tail geometry on Sceadu SZ-IV models; replace suspected wear items in sets rather than mixing old and new linkages to keep predictable control response.