EAGLE EX Main Frame Replacement HI0404687 by Hirobo  [HI0404687]

Eagle Family Structural Frame

This RC main frame is made for the Hirobo Eagle range and fits compatible Eagle, Freya, EX and SX airframes. It acts as the central chassis component that positions servos, motor mounts and boom attachments, and is intended for repair, maintenance and rebuilding tasks on those models.

Design emphasis is on correct fit and alignment rather than cosmetic finish. During installation, confirm that mounting holes line up and that there is adequate clearance for adjacent parts, check that fasteners sit flush, and inspect boom and tail junctions for even load transfer. Because this frame sets the baseline geometry for the rotor head and tail assemblies, precise placement influences handling and makes setup more consistent.

As a tuning consideration, replacing a worn or damaged main frame restores the original mounting geometry and helps retain prior pitch, cyclic and tail trim settings so further adjustments behave predictably during test flights.

Use this main frame to return a compatible Eagle-series helicopter to its factory mounting geometry, and perform standard installation checks to maintain dependable flight behavior.