Hirobo HI0403251 Tail Gear Box for GPH 346 helicopter tail gearbox part  [HI0403251]

Tail gear box for GPH 346

This is a replacement tail gear box component identified by Hirobo HI0403251, intended for use with GPH 346 scale RC helicopters. The text focuses on the part's role inside the tail drive system, its fitment for the GPH 346 line, and practical considerations for installation and tuning on model helicopters.

The component serves as the tail gearbox assembly piece that locates and supports the tail gears within the tail boom area, transferring rotational motion toward the tail rotor. As an RC-scale accessory, it is intended to restore proper gear engagement when an original tail gear box is worn or damaged.

Installation notes: confirm the HI0403251 part number against the airframe's parts list before fitting, inspect mating gears and bearings for wear during replacement, and re-check gear mesh and alignment after reassembly. Do not assume interchangeability with other models unless explicitly listed by Hirobo.

Tuning role: a correctly fitted tail gear box helps maintain consistent tail authority and reduces play in the tail drive, which in turn supports predictable yaw control and smoother flight characteristics on the GPH 346 model.