Question PPL(H) - Private Pilot License - Aircraft General Knowledge

Why is the main rotor gearbox a limiting factor in most piston-driven helicopters? - PPL(H) EN

The electronic monitoring of the gearbox reacts susceptible at high torques

The drive shaft in the gearbox is made of solid material and tends to break at high torques

The supply of oil pressure lubrication in the gearbox is constructed on average loads

The gear wheels will be displaced from each other at high torque and strain the gearbox bearings