This Hirobo main frame is an RC-scale structural replacement part identified by model HI0404631 and intended for use with common parts in Hirobo Eagle, Freya, EX and SX series helicopters. It serves as the primary chassis element that locates heads, gearboxes and mounting points, helping retain correct geometry after repair or component swaps.
Use this frame when restoring airframe alignment after impact or when replacing a fatigued chassis section. The description focuses on compatibility and assembly role rather than specific fasteners or machining details; confirm fit against your rotor head, gearbox and tailboom attachments before final installation.
As an RC-scale replacement frame, this unit is intended to restore structural alignment and provide a stable base for routine maintenance and rebuilds of compatible Hirobo helicopter models.
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