Hirobo HI0403238 GPH 346 main frame replacement for GPH 346 RC helicopter  [HI0403238]

GPH 346 Main Frame

The HI0403238 main frame is an RC-scale replacement part designed for GPH 346 series helicopters. It serves as the structural center of the airframe, registering link points for the tail boom, landing gear, and rotor head. This description focuses on compatibility, installation considerations, and how the frame affects flight trim and tuning.

Compatibility: the part name and category identify it for use with GPH 346 model helicopters; confirm your kit's part numbers before ordering to ensure a match. Do not assume cross-compatibility with other series unless explicitly listed by your supplier.

Installation notes: remove electronics and linkages before replacing the main frame, keep screw and spacer layouts organized, and inspect mounting bosses and bearing seats for wear. Use the original fasteners where possible and verify that the rotor head and tail boom align straight after assembly. Minor fitment shims or thread-locker on metal-to-metal screws can help prevent loosening during initial break-in flights.

Tuning role: the main frame controls component placement and torsional stiffness; even small misalignments can introduce vibration or tracking issues. When replacing the frame, check rotor head geometry, swashplate centring, and tail pitch linkage as part of the setup sequence. A correctly fitted frame supports predictable cyclic response and more consistent rotor RPM under load.