Pitch Arm Upgrade for Eagle Freya Helicopters - Hirobo HI0406003  [HI0406003]

This Hirobo HI0406003 pitch arm set is supplied as a replacement component for Eagle Freya helicopter builds. The arm links servo output to the rotor head, forming a key mechanical element of the collective pitch arrangement.

Installation notes: set servo to neutral, confirm control throw limits, and adjust servo horn position to achieve the desired pitch rate. Centre the blade pitch with the rotor head at trim neutral and confirm the linkage moves freely without binding after any tuning changes.

Tuning role: swapping arm geometry or changing horn position alters pitch speed and overall hover balance. Test small adjustments incrementally and trim on the bench before conducting full flight checks to dial in pitch response.