The GC series has two forms: the GCH series with a horizontal offset layout and the GCS series with a vertical offset layout. Being small in size, light in weight, high in transmission efficiency, it has long lifeand one-stage reduction, without a clutch. It is also easy to operate and maintain and suitable for bothfixed and variable pitch propellers.

1. The gearbox of GCS series has a wide range of torque and transmission capacity. When speed ratio of the gearboxrises from 2 to 4 and the input speed increases from 520r/min to 1000r/min, the gearbox's torque and transmission capacity can go up from 1kW/r/min to 30kW/ r/min.

2. According to the structure, gearboxes of GC series can be divided into two categories: vertical offset of input and output and horizontal offset of input and output.