EAGLE EX Structural Main Frame - HI0404687 Hirobo  [HI0404687]

Central Chassis Frame for EAGLE Models

Intended for Hirobo Eagle-series helicopters, this main frame provides the core structure that fixes servo positions, motor mount locations and boom attachments. It is supplied as a repair or rebuild component for compatible Eagle, Freya, EX and SX platforms.

The component is focused on precise fit and alignment rather than external finish. When installing, verify that bolt patterns match, that moving parts have sufficient clearance, and that fasteners are correctly torqued and seated. Check boom and tail junctions for symmetric load paths since this frame establishes the reference geometry for rotor head and tail alignment, which in turn influences handling.

For tuning, fitting a new main frame brings back the factory mounting geometry and helps retain previously dialed pitch, cyclic and tail trim settings so that subsequent setup tweaks remain consistent.

Select this main frame when you need to return a compatible Eagle-series helicopter to correct geometry, and complete standard checks after installation to ensure steady flight characteristics.