Replacement Main Frame for GPH 346 - Hirobo HI0403238  [HI0403238]

Main Frame Details for GPH 346

The HI0403238 main frame serves as a direct replacement part for GPH 346 series helicopters, acting as the central structural element that secures the tail boom, landing gear, and rotor assembly. The text below covers compatibility, basic fitting guidance, and the frame's role in overall airframe stiffness.

Compatibility: this designation indicates use with GPH 346 models; verify the HI0403238 identifier against your helicopter's parts list prior to purchase to avoid fitment issues. Do not presume cross-series fit unless explicitly stated by the supplier.

Installation notes: before removing the old frame, take out electronics and control linkages, label screws and spacers to keep them organised, and inspect bearing seats and bosses for damage. Prefer using original fasteners where appropriate and check that the rotor head and tail boom sit true after assembly. Applying minor shims or controlled thread-lock on metal fasteners can reduce the chance of loosening during initial flights.

Tuning role: the main frame governs component placement and torsional characteristics; incorrect alignment can introduce vibration or uneven tracking. On replacement, re-check rotor head geometry, swashplate centring, and tail pitch to restore stable tracking and consistent rotor RPM under load.