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

Compatibility and Fitment Notes

The HI0403238 main frame is specified as a replacement for GPH 346 helicopters and forms the central mounting structure for the tail boom, landing gear and rotor head. The paragraphs below discuss compatibility checks, fitting advice, and how the frame influences aircraft geometry and tuning.

Compatibility: intended for GPH 346 model helicopters; always confirm the HI0403238 part number with the parts list for your specific variant to avoid ordering an incompatible frame. Do not assume it fits other series without explicit confirmation from the seller.

Installation notes: prior to frame removal take out all electronics and linkages, lay out screws and spacers by location, and inspect bearing seats and mounting bosses for signs of wear. Where original fasteners fit correctly, reuse them and verify that the rotor head and tail boom are straight after reassembly. Minor shimming or a drop of low-strength thread-lock on metal screws can help prevent early loosening.

Tuning role: the main frame controls component placement and torsional behaviour; misaligned parts can lead to vibration or tracking problems. After installing a new frame, check rotor head geometry, swashplate centring and tail pitch linkages as part of a full setup to restore reliable cyclic response and steady rotor RPM under load.