Hirobo HI0404687 Main Frame for EAGLE EX Series  [HI0404687]

Primary Frame for EAGLE Line

This main frame is intended for the Hirobo Eagle family of models and is used as the central structural piece that locates servos, motor mount points and boom attachments. It is supplied as a replacement for maintenance, repair or full chassis rebuilds on compatible Eagle, Freya, EX and SX airframes.

Priority in the design is accurate alignment and fit. When fitting the frame, check that all mounting bosses align, allow clearance for linked components, and ensure fasteners seat properly. Inspect the boom-to-frame and tail boom junctions to confirm loads transfer evenly. Proper placement sets the reference geometry for rotor head and tail parts and affects handling consistency.

From a setup viewpoint, installing a new main frame reinstates original mounting geometry, which helps preserve previously established pitch, cyclic and tail trim so that tuning adjustments remain reliable during subsequent test flights.

Fit this frame to recover factory geometry on compatible Eagle-series helicopters and carry out the usual installation inspections to keep flight handling consistent.