Hirobo HI0404687 EAGLE EX Main Frame  [HI0404687]

Eagle Series Main Frame

This is an RC-scale main frame intended for use with Hirobo Eagle family models. The part serves as the central structural component that locates servos, motor mount points, and boom attachments, and it is intended for maintenance, repair, and chassis rebuilding on compatible Eagle/Freya/EX/SX models.

Design notes focus on fit and alignment rather than finish details. When installing, verify alignment of mounting holes and clearance for linked components, inspect fastener seating, and check boom and tail boom junctions for even load distribution. This frame functions as the baseline geometry for rotor head and tail assembly alignment, so accurate positioning affects handling and setup consistency.

Tuning role: replacing a worn or damaged main frame restores the original mounting geometry, which helps preserve previous pitch, cyclic, and tail trim settings so other setup changes remain predictable during test flights.

Use this main frame when restoring factory geometry on compatible Eagle-series helicopters, and follow standard installation checks to maintain reliable flight characteristics.