This part is an RC-scale tail rudder offered as a common replacement across HIROBO helicopter lines. The Dumper Rudder (80) acts as the active tail surface to control yaw and help stabilise the tail on Eagle, Freya, EX and SX series models.
Manufactured as a molded plastic piece, the rudder is intended for easy replacement during maintenance or after impacts. It transfers servo movement into precise tail motion and gives a steady reference point for trim corrections.
Installation notes: mount the rudder to the tail assembly using the original linkage and fasteners on supported airframes, set the control horn and linkage with the servo at neutral before tightening, and ensure full, unobstructed movement. For tuning, make cautious, incremental changes to trim and servo endpoints and evaluate hover response after each change.
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