Hirobo HI0404322 Tail Pitch Plate Boss for Eagle/Freya/EX/SX helicopters  [HI0404322]

Tail pitch plate boss overview

This HIROBO HI0404322 tail pitch plate boss is an RC-scale replacement component intended for the tail pitch assembly on models listed in its compatibility scope. It serves as the mounting boss where the pitch plate and tail linkage interface, providing a defined pivot and locating point for the tail pitch mechanism.

Designed for straightforward integration into the tail assembly, the part's role is primarily mechanical: retain alignment of the pitch plate, reduce lateral play in the linkage, and keep consistent geometry for pitch response. It is described here in a neutral, technical manner for hobbyists who perform routine maintenance, part swaps, or fine tuning of tail control.

Installation notes: verify existing linkage geometry before removing the old boss, keep fasteners torqued to the model manufacturer's recommendations, and check for free movement through the full pitch range after installation. During setup, small adjustments at the boss or pitch plate can affect tail sensitivity and stability, so make incremental changes and test hover/taxi behavior before aggressive tuning.